Up till yesterday Thunderbird (release 99.10) was working fine on my Exchange account. Since this morning Thunderbird was claiming my password was not correct. However I can use this same password on my iPhone and on Outlook. I decided to change he password. The new password again works on the iPhone and Outlook but not in Thunderbird. Today I upgrade Thunderbird to the latest version 102.0 and also reverted to version 98 but same problem. I deleted the account and tried to add it back again and I get a verification error: ''Configuration could not be verified. If you username and password are correct, it's likely that the server administrator disabled the selected configuration for your account. Try setting another protocol. '' Any suggestion? Thanks, Gideon