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#requires -Version 3.0
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<#
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.SYNOPSIS
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Remove the access to Outlook for all Mailboxes in an Microsoft Office 365 Tenant
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.DESCRIPTION
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Remove the access to Outlook for all Mailboxes in an Microsoft Office 365 Tenant
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It will remove access to OWA (Outlook Web Application), Exchange Active Sync (EAS), Outlook App and Outlook (part of the Office Suite).
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.PARAMETER CredentialUser
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The UPN of the admin user
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.PARAMETER CredentialFile
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File where the credential will be stored
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Make sure that this is secured!
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.PARAMETER ProxyAccessType
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Determines which mechanism is used to resolve the host name. The acceptable values for this parameter are:
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- IEConfig
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- WinHttpConfig
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- AutoDetect
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- NoProxyServer
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- None
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The default value is None.
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For information about the values of this parameter, see the description of the System.Management.Automation.Remoting.ProxyAccessTypehttp://go.microsoft.com/fwlink/?LinkId=144756 (http://go.microsoft.com/fwlink/?LinkId=144756) enumeration in the Microsoft Developer Network (MSDN) library.
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.EXAMPLE
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PS C:\> .\Approve-CASMailboxSettings.ps1
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.EXAMPLE
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PS C:\> .\Approve-CASMailboxSettings.ps1 -verbose
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.NOTES
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I created the script to run automated (via Windows scheduler) and it will save the password in a plain text file.
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You might want to use another option to gain access to Exchange Online
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Please check all values before using the script!
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TODO: Run the script once before using it as scheduled task! This will create and save the credentials.
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#>
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[CmdletBinding(ConfirmImpact = 'None')]
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param
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(
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[Parameter(ValueFromPipeline,
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ValueFromPipelineByPropertyName)]
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[ValidateNotNullOrEmpty()]
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[Alias('Username', 'AdminUser')]
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[string]
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$CredentialUser = 'youradmin.user@contoso.com',
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[Parameter(ValueFromPipeline,
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ValueFromPipelineByPropertyName)]
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[ValidateNotNullOrEmpty()]
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[Alias('CredFile', 'SecretFile')]
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[string]
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$CredentialFile = ($env:LOCALAPPDATA + '\exocreds.txt'),
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[Parameter(ValueFromPipeline,
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ValueFromPipelineByPropertyName)]
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[ValidateSet('IEConfig', 'WinHttpConfig', 'AutoDetect', 'NoProxyServer', 'None', IgnoreCase = $true)]
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[ValidateNotNullOrEmpty()]
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[Alias('PSSessionOptionProxy')]
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[string]
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$ProxyAccessType = 'None'
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)
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begin
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{
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# Admin User (Global Admin or min. Exchange Online Admin role)
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if (-not ($CredentialUser))
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{
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$CredentialUser = 'youradmin.user@contoso.com'
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}
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# Where to store the password?
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if (-not ($CredentialFile))
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{
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$CredentialFile = ($env:LOCALAPPDATA + '\exocreds.txt')
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}
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}
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process
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{
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#region CredentialHandler
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try
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{
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if (-not (Test-Path -Path $CredentialFile -ErrorAction SilentlyContinue))
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{
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# Do we have any credentials in memory (variable)
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if (-not ($ExoCreds))
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{
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#
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$paramGetCredential = @{
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Message = 'Bitte mit einem Exchange Online Admin Benutzer anmelden'
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UserName = $CredentialUser
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ErrorAction = 'Stop'
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}
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$ExoCreds = (Get-Credential @paramGetCredential)
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}
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# Splat the parameters
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$paramOutFile = @{
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FilePath = $CredentialFile
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Force = $true
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Encoding = 'utf8'
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ErrorAction = 'Stop'
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Confirm = $false
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}
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# Save the file
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$null = ($ExoCreds.Password | ConvertFrom-SecureString | Out-File @paramOutFile)
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}
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else
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{
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# Splat the parameters
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$paramGetContent = @{
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Path = $CredentialFile
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Force = $true
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ErrorAction = 'Stop'
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}
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$paramConvertToSecureString = @{
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ErrorAction = 'Stop'
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}
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# Read and convert the file wit the password
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$PwdSecureString = (Get-Content @paramGetContent | ConvertTo-SecureString @paramConvertToSecureString)
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# Splat the parameters
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$paramNewObject = @{
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TypeName = 'System.Management.Automation.PSCredential'
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ArgumentList = $CredentialUser, $PwdSecureString
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}
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# Create the credential object
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$ExoCreds = (New-Object @paramNewObject)
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# Remove the password string from memory
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$PwdSecureString = $null
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}
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}
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catch
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{
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#region ErrorHandler
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# get error record
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[Management.Automation.ErrorRecord]$e = $_
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# retrieve information about runtime error
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$info = [PSCustomObject]@{
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Exception = $e.Exception.Message
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Reason = $e.CategoryInfo.Reason
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Target = $e.CategoryInfo.TargetName
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Script = $e.InvocationInfo.ScriptName
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Line = $e.InvocationInfo.ScriptLineNumber
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Column = $e.InvocationInfo.OffsetInLine
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}
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$info | Out-String | Write-Verbose
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Write-Error -Message ($info.Exception) -ErrorAction Stop
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# Only here to catch a global ErrorAction overwrite
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break
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#endregion ErrorHandler
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}
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#endregion CredentialHandler
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#region ConnectExchangeOnline
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try
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{
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# Proxy Handling
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<#
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-ProxyAccessType <ProxyAccessType>
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Determines which mechanism is used to resolve the host name. The acceptable values for this parameter are:
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- IEConfig
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- WinHttpConfig
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- AutoDetect
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- NoProxyServer
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- None
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The default value is None.
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For information about the values of this parameter, see the description of the System.Management.Automation.Remoting.ProxyAccessTypehttp://go.microsoft.com/fwlink/?LinkId=144756 (http://go.microsoft.com/fwlink/?LinkId=144756) enumeration in the Microsoft Developer Network (MSDN) library.
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Source:
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Get-Help New-PSSessionOption -Detailed
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#>
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if ($ProxyAccessType)
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{
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# Splat the parameters
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$paramNewPSSessionOption = @{
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ProxyAccessType = $ProxyAccessType
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ErrorAction = 'Stop'
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}
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# Do we need a proxy to access Office 365?
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$ProxyOptions = (New-PSSessionOption @paramNewPSSessionOption)
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}
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# Cleanup
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$ExoSession = $null
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# Splat the parameters
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$paramGetPSSession = @{
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ErrorAction = 'SilentlyContinue'
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}
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$paramRemovePSSession = @{
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ErrorAction = 'SilentlyContinue'
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Confirm = $false
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}
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# Remove all existing Exchange Online Sessions
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$null = (Get-PSSession @paramGetPSSession | Where-Object {
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$_.ComputerName -eq 'outlook.office365.com'
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} | Remove-PSSession @paramRemovePSSession)
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# Splat the parameters
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$paramNewPSSession = @{
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ConfigurationName = 'Microsoft.Exchange'
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ConnectionUri = 'https://outlook.office365.com/powershell-liveid/'
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Credential = $ExoCreds
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Authentication = 'Basic'
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AllowRedirection = $true
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ErrorAction = 'Stop'
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}
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# Proxy settings needed?
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if ($ProxyOptions)
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{
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$paramNewPSSession.SessionOption = $ProxyOptions
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}
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# Create the session
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$ExoSession = (New-PSSession @paramNewPSSession)
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# Splat the parameters
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$paramImportPSSession = @{
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Session = $ExoSession
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DisableNameChecking = $true
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AllowClobber = $true
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ErrorAction = 'Stop'
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WarningAction = 'Continue'
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}
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# Create the Session
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$null = (Import-PSSession @paramImportPSSession)
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}
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catch
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{
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#region ErrorHandler
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# get error record
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[Management.Automation.ErrorRecord]$e = $_
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# retrieve information about runtime error
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$info = [PSCustomObject]@{
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Exception = $e.Exception.Message
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Reason = $e.CategoryInfo.Reason
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Target = $e.CategoryInfo.TargetName
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Script = $e.InvocationInfo.ScriptName
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Line = $e.InvocationInfo.ScriptLineNumber
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Column = $e.InvocationInfo.OffsetInLine
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}
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$info | Out-String | Write-Verbose
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Write-Error -Message ($info.Exception) -ErrorAction Stop
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# Only here to catch a global ErrorAction overwrite
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break
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#endregion ErrorHandler
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}
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#endregion ConnectExchangeOnline
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#region SetCASMailbox
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try
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{
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# Check if the session is alive
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if (-not (Get-Command -Name Get-CASMailbox))
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{
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# Splat the parameters
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$paramWriteError = @{
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Exception = 'Es scheint ein Problem mit der Exchange Online Verbindung zu geben!'
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Message = 'Die erforderlichen Exchnage Online Befehle wurden nicht gefunden!'
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Category = 'ResourceUnavailable'
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ErrorAction = 'Stop'
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}
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Write-Error @paramWriteError
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# Make sure we are done!
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throw
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}
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# Splat the parameters
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$paramGetCASMailbox = @{
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ResultSize = 'unlimited'
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Filter = {
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(name -notlike 'DiscoverysearchMailbox*')
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}
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ErrorAction = 'Stop'
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WarningAction = 'Continue'
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}
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$paramSetCASMailbox = @{
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ActiveSyncEnabled = $false
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ImapEnabled = $false
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MAPIEnabled = $false
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OutlookMobileEnabled = $false
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OWAEnabled = $false
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OWAforDevicesEnabled = $false
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PopEnabled = $false
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SmtpClientAuthenticationDisabled = $false
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UniversalOutlookEnabled = $false
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Confirm = $false
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ErrorAction = 'Continue'
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WarningAction = 'Continue'
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}
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# Remove the outlook access from all mailboxes
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$null = (Get-CASMailbox @paramGetCASMailbox | Set-CASMailbox @paramSetCASMailbox)
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}
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catch
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{
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#region ErrorHandler
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# get error record
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[Management.Automation.ErrorRecord]$e = $_
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# retrieve information about runtime error
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$info = [PSCustomObject]@{
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Exception = $e.Exception.Message
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Reason = $e.CategoryInfo.Reason
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Target = $e.CategoryInfo.TargetName
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Script = $e.InvocationInfo.ScriptName
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Line = $e.InvocationInfo.ScriptLineNumber
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Column = $e.InvocationInfo.OffsetInLine
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}
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$info | Out-String | Write-Verbose
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Write-Error -Message ($info.Exception) -ErrorAction Stop
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# Only here to catch a global ErrorAction overwrite
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break
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#endregion ErrorHandler
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}
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#endregion SetCASMailbox
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}
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end
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{
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# Cleanup
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$ExoSession = $null
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# Splat the parameters
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$paramGetPSSession = @{
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ErrorAction = 'SilentlyContinue'
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}
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$paramRemovePSSession = @{
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ErrorAction = 'SilentlyContinue'
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Confirm = $false
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}
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# Remove all existing Exchange Online Sessions
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$null = (Get-PSSession @paramGetPSSession | Where-Object {
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$_.ComputerName -eq 'outlook.office365.com'
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} | Remove-PSSession @paramRemovePSSession)
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}
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#region LICENSE
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<#
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BSD 3-Clause License
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Copyright (c) 2021, enabling Technology
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#>
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#endregion LICENSE
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#region DISCLAIMER
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<#
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DISCLAIMER:
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- Use at your own risk, etc.
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- This is open-source software, if you find an issue try to fix it yourself. There is no support and/or warranty in any kind
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- This is a third-party Software
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- The developer of this Software is NOT sponsored by or affiliated with Microsoft Corp (MSFT) or any of its subsidiaries in any way
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- The Software is not supported by Microsoft Corp (MSFT)
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- By using the Software, you agree to the License, Terms, and any Conditions declared and described above
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- If you disagree with any of the terms, and any conditions declared: Just delete it and build your own solution
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#>
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#endregion DISCLAIMER
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Reference in New Issue
Block a user