Intune Local User Group Membership Not Working with 65000 Error? Here’s the Fix
Recently, I deployed a few accounts to the Local Administrators group on end-user devices through Intune.
The path I used was:Endpoint Security → Account Protection → Local User Group Membership
Since I only needed to add specific accounts without removing existing ones, I chose the “Add (Update)” option under Group and user action.
This format doesn’t establish a proper mapping between the user accounts and their security identifiers (SIDs) on hybrid-joined devices, causing the policy to fail.
You can check the event logs end user device
Event Viewer → Microsoft-Windows-DeviceManagement-Enterprise-Diagnostics-Provider (Admin)
How to Fix It
Instead of using the built-in “Select users/groups” option, manually enter the users using their User Principal Names (UPNs) in the correct format.
When configured this way, the event logs will show the accounts added successfully, and the policy will apply without any error