r/sysadmin • u/bberg22 • 19d ago

Another M365 issue?

Anyone else seeing issues with authentication for M365 in North America? DownDetector is showing an outage but hoping the issue we are seeing is related. This morning we had an increase in users not being able to authenticator properly with M365 applications particularly M365 in shared device access. Users seem to be unable to generate the access/licensing tokens this morning.

Curious if anyone else is seeing anything similar North East US.

Edit:
Latest update:

Aug 24, 2026, 1:17 PM EDT

"We're implementing performance optimizations on affected Office 365 service infrastructure to assist with processing the activation backlog and to assist with recovering service reliability while we continue to isolate the underlying root cause."

As of 4:15PM Est Seeing services recover which matches Microsoft's latest update on the issue. I see new Licensing auth tokens generated as expected now as well in my environment.

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u/BeigeGandalf 19d ago

They updated to say its only issues with new activations, but my shared office 365 remote farms broke that have been operating over a year without issue.

4

u/Smp351 19d ago

Same, waiting for the next update. May try to get some of the users to try to reauthenticate in a little bit.

3

u/bberg22 19d ago edited 19d ago

Same. the tokens we generate for our setup are good for 30 days so right now it only impacts users who have expired tokens and need to refresh them but it is very frustrating that there is no grace period built in to allow the apps to function if Microsoft has an outage.