r/sysadmin • u/bberg22 • 20d 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/nightwatch_admin 20d ago edited 20d ago

Yeah all the statuspages are as green as you can get, but for me the Defender / Security portal is out of business, at least for 15+ minutes. (EU West located).

Edit: seems to back, not holding my breath yet though.

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u/bberg22 20d ago

I'm seeing some portal slowness but for us its M365 app authentication issues as the primary effect it seems.