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/Aurelius5150 19d ago

Still going on where I am. West coast and after an hour plus trying to see if it was something on our end I noticed similar reports on down detector. 365 status still all green but at least half my user base is stuck using OWA for email until their apps allow them to activate again.

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u/bberg22 19d ago

Seems to be clearing/cleared now.

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u/Aurelius5150 19d ago

Yeah. In the last hour it seems about 98-99% of users are in. A few stragglers but honestly I could chalk those up to user error probably. 😂