Join the Mozilla’s Test Days event from Dec 2–8 to test the new Firefox address bar on Firefox Beta 134 and get a chance to win Mozilla swag vouchers! 🎁

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Thunderbird (102.5.0) suddenly stops showing MS Exchange account and I'm given the following error: "AADSTS900561: The endpoint only accepts POST requests. Received a GET request."

  • 1 ŋuɖoɖo
  • 0 masɔmasɔ sia le wosi
  • 1 view
  • Nuɖoɖo mlɔetɔ christ1

more options

I've been successfully using TB for years as my single email application for viewing both my personal Gmail email and (with Owl) my Microsoft Exchange business email. However, suddenly the MS Exchange account has stopped loading on start-up and the following error message is provided: "AADSTS900561: The endpoint only accepts POST requests. Received a GET request." Outlook is painful to work with and I really need to access my business email ASAP. Any assistance would be greatly appreciated.

I've been successfully using TB for years as my single email application for viewing both my personal Gmail email and (with Owl) my Microsoft Exchange business email. However, suddenly the MS Exchange account has stopped loading on start-up and the following error message is provided: "AADSTS900561: The endpoint only accepts POST requests. Received a GET request." Outlook is painful to work with and I really need to access my business email ASAP. Any assistance would be greatly appreciated.

All Replies (1)

more options

Try to allow cookies in Thunderbird for https://login.microsoftonline.com and https://autologon.microsoftazuread-sso.com.

Check the article at https://support.mozilla.org/en-US/kb/automatic-conversion-google-mail-accounts-oauth20 and follow the instructions in section "How to avoid or correct an OAuth failure caused by rejected cookies".

christ1 trɔe