Add-ins stoped working in Word and Outlook + Authenticity problems

Hi @Maksim Serbakov

Based on your description, I suspect you may actually have two related problems:

Office add-ins in Word and Outlook no longer work. Microsoft account/Microsoft 365 authentication is failing with AADSTS5000224

The second issue is significant because Office add-ins depend heavily on Microsoft 365 web authentication. If Office cannot properly authenticate your account, add-ins often stop loading.

What AADSTS5000224 means

AADSTS5000224 usually indicates that the Microsoft Entra ID (Azure AD) tenant associated with the sign-in has been deauthenticated, blocked, or disabled at the tenant level. Microsoft moderators repeatedly describe it as a tenant authentication issue that requires Microsoft intervention to re-enable access.

If you're using:

-a personal Microsoft account (@outlook.com, @hotmail.com, etc.), this error is unusual and may indicate you're being redirected to an old organizational tenant.

-a work or school account, the tenant itself may have been disabled or deauthorized.

Another important clue: your Mac

Microsoft's modern authentication and WebView-based add-in framework have become increasingly dependent on newer macOS components. While Office 16.88 is supported on Monterey, authentication issues are more common on older systems.

Practical troubleshooting steps

Step 1: Check whether the account itself works

Try signing in here using Safari:

https://portal.office.com

If you receive AADSTS5000224 on both sites, the account issue must be resolved first.

Step 2: Remove and re-add the account in Office

However, try to sign into the same Microsoft account from another computer. If add-ins work there, the issue is likely local to the Mac.

If the same AADSTS5000224 error appears everywhere, please try to ask your IT Administrator. Thank you.