Get-pseEntraIDUserGroup.ps1
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function Get-pseEntraIDUserGroup { <# .SYNOPSIS Retrieves group membership information for users from Microsoft Graph API based on their UserPrincipalName (UPN). .DESCRIPTION This function retrieves group membership information for users from Microsoft Graph API based on their UserPrincipalName (UPN). It requires an access token with appropriate permissions to access Microsoft Graph. .PARAMETER UPN Specifies the UserPrincipalName (UPN) of the user(s) whose group membership information is to be retrieved. This parameter accepts input from the pipeline. If not specified, the default value is set to the UPN of the currently logged-in user. .PARAMETER AccessToken Specifies the access token required to authenticate with Microsoft Graph API. This parameter is mandatory. .EXAMPLE Get-pseEntraIDUserGroup -UPN "user1@mycompany.com" -AccessToken "your_access_token_here" Retrieve group membership information for a single user with the specified UPN. .EXAMPLE "user1@mycompany.com" | Get-pseEntraIDUserGroup -AccessToken "your_access_token_here" Retrieve group membership information for a single user using pipeline input for the UPN. .EXAMPLE $customObject = [pscustomobject]@{ UPN = "user1@mycompany.com" AccessToken = "your_access_token_here" } $customObject | Get-pseEntraIDUserGroup Retrieve group membership information for user(s) whose UPNs are contained in a custom object sent through the pipeline. .NOTES Author: owen.heaume Version: 1.0.0 Initial Release 1.0.1 Add @odata.nextlink code so it returns all groups if over 100 (Previously would only return a max of 100 groups) #> [cmdletbinding()] param( [parameter(Mandatory = $false, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true)] [Alias('UserPrincipalName')] [string[]]$UPN = "$ENV:Username@mycompany.com", [parameter(Mandatory = $true, ValueFromPipelineByPropertyName = $true)] [string]$AccessToken ) Begin { } process { foreach ($user in $UPN) { $url = "https://graph.microsoft.com/v1.0/users/$user/memberOf" $allGroups = @() do { try { $result = Invoke-RestMethod -Method Get -Uri $url -Headers @{Authorization = "Bearer $($AccessToken)" } -ea Stop -UseBasicParsing $allGroups += $result.value $url = $result.'@odata.nextLink' } catch { Write-error "$User Error: $($_.Exception.Message)" $url = $null } } while ($url) $allGroups | ForEach-Object { [pscustomobject]@{ UPN = $user GroupID = $_.id DisplayName = $_.displayName Description = $_.description MailEnabled = $_.mailEnabled CreationDate = $_.createdDateTime } } } } } |