Nonprofit tenant deauthenticated (AADSTS5000224) for 21 days – all operations down

Our nonprofit’s Microsoft 365 / Entra ID tenant has been inaccessible since 20 October 2026. Every sign-in, including the Global Administrator, fails with AADSTS5000224 (“The tenant you are trying to access has been deauthenticated and is no longer available”).

Impact

Right now our organization is unable to operate. No one can sign in to anything connected to Microsoft:

• Email is completely down. We can’t send or receive mail, which means we can’t apply for or respond to grant opportunities, and our nonprofit depends on that funding.
• No access to our files or productivity tools. Shared drives, Word, PowerPoint and the rest of Microsoft 365 are unavailable.
• Entra SSO is down, so we’re also locked out of the services that sign in through it, including our hosting providers and analytics platforms.

Support history

• 20 Oct: First support case opened (TrackingID#2610210040000855). It was routed as an MFA issue and later archived.
• 26 Oct: Current case opened (TrackingID#2610260040010028), also initially routed as an MFA/sign-in issue.
• 3 Nov: The case reached the Identity & Access team, who have been very helpful and are escalating it internally.
• 10 Nov: Support let us know that an engineer hasn’t been assigned to the investigation yet, so there’s no timeline so far.

If anyone from Microsoft is able to take a look or point this to the right team, I’d really appreciate it. I’m happy to provide the tenant details by private message.