Azure AD Connect did not Install or Service gets stopped after installation

So I encountered this issue, while installing Azure AD connect yesterday and been noticing this for another customer environment for a while.

You get the following error when you try to install Azure AD Connect.

Similarly so.metimes you notice that Azure AdSync Service is stopped and when you try to start it it gives the same error

Tried removing and reinstalling AAdConnect few times even rebooted server but no luck.

Resolution

Normally in such case Group policy is the culprit.

You may have the same issue for "Default Domain Policy" or other group policy that applies to regular member server.

• Find “Log on as a service” group policy setting is found under Computer Configuration > Windows Settings > Security Settings > Local Policies > User Rights Assignment.
• Add "Azure AD connect" account or service account that you may defined during Azue AD Connect deployment to the list of allowed accounts.
• Run "gpupdate /force" from the Command Prompt to update Group Policy instantly.
• Relaunch the setup again and you should be good to go.

For any questions please write or comment so I can answer accordingly.