Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
I saw another post of "zero-day" problems with Microsoft 365 (i'm installing Office 2021), when using latest Windows Defender definitions, so I followed these steps:
- Open cmd as admin and navigate to "C:\Program files\Windows defender".
- Execute this command: MpCmdRun.exe -RemoveDefinitions
This did roll back my Defender definitions, but it DID NOT fix my issue.
Still unresolved.
Edit: I also now have completely disabled all portions of Defender antivirus and Windows Firewall, and completely uninstalled Carbon Black. (I Just installed Office 2021 on a different new Windows 10 box last week without doing any of this, seems to be a new issue)
I also have disconnected from ethernet, and tried using an unfiltered guest wifi network, same result.
Edit 2:
I have also tried the suggested mitigation for the current M365 issue (in case related to my Office 2021 issue):
With Powershell ru:
Add-MpPreference -AttackSurfaceReductionRules_Ids 92e97fa1-2edf-4476-bdd6-9dd0b4dddc7b -AttackSurfaceReductionRules_Actions Disabled
This also DID NOT RESOLVE the issue.
Edit 3:
I removed the registry keys again, restarted as local user (versus domain user) and still same errors.
(defender, firewall both disabled, antivirus uninstalled)
Still NOT RESOLVED
Final Edit:
I've tried for hours and dozens of solutions. I ended up formatting the laptop again, installing Office with the offline installer immediately before any Windows updates were done and it worked. I would guess one of the updates released around 1/12/2023 caused the issues.
It would be nice if Microsoft rep would update this case with a cause for the problem and potential fix without having to format.