10/9/2023 0 Comments Thunderbird exchange 365Some users are working from and have a different IP address and it happens for them intermittently too.I found the sign-in history in Azure AD and there is no log for when the connection timed out.The account is a shared mailbox with 6 users.Different users get the error message intermittently, but not all at the same time.It is the first time using Office365 so I am not used to it, but I can't find anywhere in there to diagnose failed connections, etc.ĭoes anyone know how I can get to the bottom of this issue?įurther Info based on Rohit Gupta's reply: It doesn't seem to happen to all users at the same time even though they are sitting next to each other. ![]() Updating Thunderbird to the latest version.Increasing the timeout in Thunderbird (mailnews.tcptimeout).If your administrator does not allow IMAP access, then you won't be able to use Thunderbird with your account. Thunderbird does NOT support Microsoft's proprietary protocols to access Exchange servers or Office 365. Ignoring Thunderbird process and folders in Windows Defender Antivirus. Thunderbird supports the internet standard access methods POP3 and IMAP4.There is also a user at a different site which it occurs for as well. The timeout might happen a few times a day for each user and it sometimes only lasts for a few seconds and they are back in again. Because multiple users can be sharing an inbox, this causes a great deal of confusion because once the connection times out, the inbox is no longer the same as the other users and they do a lot of moving emails and renaming the subject (using header tools). ![]() We had been using Thunderbird and had no problems previously.Īfter switching to Exchange, Thunderbird is intermittently throwing Connection Timeout errors. ![]() As per an answer listed on How to access a Shared Mailbox using Thunderbird or other IMAP client you may just need to define, confirm, or change a unique alias for the shared mailbox in Exchange 2016 and then use the below syntax rather than what you tried per your question.Our company has recently switched from Kerio Connect on-premises email server to Exchange Online.
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