Added Files

Powershell/PowerShell-Office365Admin/AzureAD/InviteGuestAndAddToGroup.ps1

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+# Script to invite a list of guest users to AzureAD and add them to a group
+#
+# Useful for bulk adding guests to a SharePoint or Teams group
+#
+# Uses a CSV file containing columns for FirstName,LastName,DisplayName,ExternalEmailAddress
+#
+
+# Where is our list of people?
+$contactsFile = 'C:\Temp\ExternalContacts.csv'
+
+# What group are we added them to?
+$groupName = 'Test Group'
+
+# Import the AzureAD module and connect
+Import-Module AzureAD
+Connect-AzureAD
+
+# Import the list of people
+$contactsList = Import-Csv -Path $contactsFile
+
+# Find the group ID for our group
+$groupID = (Get-AzureADGroup -All $true | Where-Object {$_.DisplayName -eq $groupName}).ObjectId
+
+# Run through the list sending the guest invite and adding them to the group, unless their email address is already used somewhere
+foreach ($externalUser in $contactsList) {
+    $getExisting = Get-AzureADUser -SearchString $externalUser.ExternalEmailAddress
+
+    if ($getExisting.Count -eq 0) {
+        $newUser = New-AzureADMSInvitation -InvitedUserDisplayName $externalUser.DisplayName -InvitedUserEmailAddress $externalUser.ExternalEmailAddress -SendInvitationMessage $true -InviteRedirectUrl "https://myapps.microsoft.com"
+        Add-AzureADGroupMember -ObjectId $groupID -RefObjectId $newUser.InvitedUser.Id
+        Write-Output -InputObject ('Guest ' + $externalUser.ExternalEmailAddress + ' created and added to group.')
+    }
+    else {
+        Write-Output -InputObject ('Object already exists with email address ' + $externalUser.ExternalEmailAddress + '.')
+    }
+}