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Thunderbird fails to login to exchange 2007 server

  • 1 reply
  • 3 have this problem
  • Last reply by jscher2000

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Thunderbird client fails the login to the exchange server, can login via OWA but fails when logging in via thunderbird. Asked administrators for a test account this worked using Thunderbird.

The administrators assure me it is an issue with my client as they do not have any other issues of this nature, I am unsure if this is accurate. I am using IMAP as was requested by the Admins.

the error code I receive is 800cccd1 if this helps. I have tried researching this question but returned no results corresponding to my issue.

thanks in advance for any advice

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You get this message:

The server has rejected your login. Please verify that your user name and password are correct. Error Code: 800cccd1

And Thunderbird can successfully receive/send on the test account but not on your own account, with the same server/port/SSL settings?

Other than the possibility that your password is incorrect...

Does your server require or have you tried entering your login username in this format:


I don't know whether the following is relevant to your mailbox (server-side issue): Error when you use an IMAP4 client or a POP3 client to log on to a delegate mailbox of Exchange Server 2007: "800cccd1".