Microsoft 365 and Office Updates | Failure to Update

Same issue here with MS 365 on the same build. Offline and online repair did nothing as did all other workarounds and suggestions.

The only thing left here is, apparently, to revert to an earlier build which is, frankly, just nuts. At some point this needs to be fixed and it's MSFT that needs to fix it on their end in some way, shape, or form.

Exact same issue here on Outlook 2021: fully updated Windows 11, happened after installing the Outlook 17726.20126 update. The off-line repair tool did not help; I have used the on-line repair in the past, but that forced me to rebuild the Outlook installation from scratch - which I'd rather avoid doing again.

There is a way to revert/rollback to the previous version; see entry# 5 on:

https://www.tenforums.com/microsoft-office-365/214150-office-2016-c2r-update-error-30088-27-a.html .

And then perhaps keep an eye on

https://learn.microsoft.com/en-us/officeupdates/current-channel?redirectSourcePath=%252farticle%252f95c8d81d-08ba-42c1-914f-bca4603e1426 

to check for latest releases.

Same issue with latest O365

Same issue with Windows 10 and Office 2019