Note for CBA

Added note for CBA and Graph API

Author: Batre-MSFT

exchange/exchange-ps/exchange/Add-UnifiedGroupLinks.md

@@ -16,6 +16,8 @@ This cmdlet is available only in the cloud-based service.
 
 Use the Add-UnifiedGroupLinks cmdlet to add members, owners and subscribers to Microsoft 365 Groups in your cloud-based organization. To remove members, owners and subscribers, use the Remove-UnifiedGroupLinks cmdlet. To modify other properties of Microsoft 365 Groups, use the Set-UnifiedGroup cmdlet.
 
+Note: You can't use this cmdlet to remove members, owners or subscribers if you connect using certificate based authentication (also known as CBA or app-only authentication for unattended scripts). You can use Microsoft Graph instead.
+
 For information about the parameter sets in the Syntax section below, see [Exchange cmdlet syntax](https://docs.microsoft.com/powershell/exchange/exchange-cmdlet-syntax).
 
 ## SYNTAX