Get-MsOGroupMembers

MSOnline: Get group members from Azure AD

Script

#Requires -Version 5.1

[CmdletBinding()]
Param(
    [Parameter(Mandatory = $true, ParameterSetName = 'Id')]
    [guid]$GroupObjectId,
    [Parameter(Mandatory = $true, ParameterSetName = 'Name')]
    [string]$GroupName,
    [Parameter(ParameterSetName = 'Name')]
    [Parameter(ParameterSetName = 'Id')]
    [switch]$Nested,
    [Parameter(ParameterSetName = 'Name')]
    [Parameter(ParameterSetName = 'Id')]
    [ValidateSet('User','Group','Contact','ServicePrincipal')]
    [string[]]$MemberObjectTypes,
    [Parameter(ParameterSetName = 'Name')]
    [Parameter(ParameterSetName = 'Id')]
    [guid]$TenantId
)

Process {
    try {
        if ($PSCmdlet.ParameterSetName -eq 'Id') { $grp = Get-MsolGroup -ObjectId $GroupObjectId -TenantId $TenantId -ErrorAction Stop }
        else { $grp = Get-MsolGroup -SearchString $GroupName -TenantId $TenantId -ErrorAction Stop | Select-Object -First 1 }

        $getArgs = @{'ErrorAction' = 'Stop'; 'GroupObjectId' = $grp.ObjectId; 'TenantId' = $TenantId}
        if ($MemberObjectTypes) { $getArgs.Add('MemberObjectTypes', $MemberObjectTypes) }
        if ($Nested) { $getArgs.Add('All', $true) }

        $result = Get-MsolGroupMember @getArgs | Select-Object *

        if ($null -eq $result -or $result.Count -eq 0) { Write-Output "No group members found"; return }
        foreach ($item in $result) { $item | Add-Member -NotePropertyName Timestamp -NotePropertyValue (Get-Date -Format 'yyyy-MM-dd HH:mm:ss') -PassThru -Force }
    }
    catch { throw }
}

Customize

GroupObjectId guid

Unique ID of the group

GroupName string

Display name of the group

Nested switch

Off

Show group members nested recursively

MemberObjectTypes string

Filter by member object types (User, Group, Contact, ServicePrincipal)

TenantId guid

Unique ID of the tenant