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Authentication Failure outlook.office365.com only on startup

Paul

Hi, Every time I start Thunderbird from a cold startup, I get the message: Authentication failure while connecting to server outlook.office365.com then.... everything works fine from then on. I can send and receive normally. This can also sometimes happen when I close thunderbird and restart during the day - but not always ! Obviously all the outlook sign-in settings are OK, as it works fine for the rest of the day. Is this known/common/fixable ?

Regards, Paul


Windows 11 (26H2) Thunderbird 156.0 (64-bit)

Hi, Every time I start Thunderbird from a cold startup, I get the message: '''Authentication failure while connecting to server outlook.office365.com''' then.... everything works fine from then on. I can send and receive normally. This can also sometimes happen when I close thunderbird and restart during the day - but not always ! Obviously all the outlook sign-in settings are OK, as it works fine for the rest of the day. Is this known/common/fixable ? Regards, Paul Windows 11 (26H2) Thunderbird 156.0 (64-bit)

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