Added Files

Powershell/PowerShell-Office365Admin/Exchange/GetAllForwardingRules.ps1

@@ -0,0 +1,38 @@
+# Script to get all client forwarding rules, smtp forwarding rules and delegates on mailboxes
+#
+# This builds on top of a script from https://github.com/OfficeDev/O365-InvestigationTooling
+#
+
+# Establish a session to Exchange Online
+$credentials = Get-Credential -Message 'Enter your Exchange Online administrator credentials'
+$connectionParams = @{
+    'ConfigurationName' = 'Microsoft.Exchange';
+    'ConnectionUri' = 'https://outlook.office365.com/powershell-liveid/';
+    'Credential' = $credentials;
+    'Authentication' = 'Basic';
+    'AllowRedirection' = $true
+} 
+$exchangeSession = New-PSSession @connectionParams
+Import-PSSession -Session $exchangeSession
+
+$allUsers = @()
+$allUsers = Get-Mailbox -ResultSize Unlimited | Select-Object DisplayName,UserPrincipalName,ForwardingAddress,ForwardingSMTPAddress,DeliverToMailboxandForward
+
+$userInboxRules = @()
+$userDelegates = @()
+
+foreach ($user in $allUsers) {
+    Write-Progress -Activity "Checking inbox rules for..." -status $user.UserPrincipalName -percentComplete ($allUsers.IndexOf($user) / $allUsers.Count * 100)
+    $userInboxRules += Get-InboxRule -Mailbox $user.UserPrincipalName | `
+        Select-Object MailboxOwnerId,Name,Description,Enabled,Priority,ForwardTo,ForwardAsAttachmentTo,RedirectTo,DeleteMessage | `
+        Where-Object {($_.ForwardTo -ne $null) -or ($_.ForwardAsAttachmentTo -ne $null) -or ($_.RedirectsTo -ne $null)}
+    $userDelegates += Get-MailboxPermission -Identity $user.UserPrincipalName | Where-Object {($_.IsInherited -ne "True") -and ($_.User -notlike "*SELF*")}
+}
+
+$smtpForwarding = $allUsers | Select-Object DisplayName,ForwardingAddress,ForwardingSMTPAddress,DeliverToMailboxandForward | Where-Object {$_.ForwardingSMTPAddress -ne $null}
+
+$userInboxRules | Export-Csv MailForwardingRulesToExternalDomains.csv -NoTypeInformation
+$smtpForwarding | Export-Csv Mailboxsmtpforwarding.csv -NoTypeInformation
+$userDelegates | Export-Csv MailboxDelegatePermissions.csv -NoTypeInformation
+
+Remove-PSSession -Session $exchangeSession