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can't authenticate with exchange server after thunderbird update to V38

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kimccain
kimccain
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I have several users running Thunderbird as a mail client connecting to an Exchange 2010 server. One user updated from v37 (which was working fine) on Friday before leaving work and on Monday morning can no longer authenticate to the mail server. One user updated this morning and has the same problem. No settings were changed. Those users who have not yet updated are still authenticating without problems. When launched, Thunderbird prompts user to change authentication method. Current IMAP settings are using port 143, STARTTLS and Normal Password. We have tried changing these settings and nothing works. Setting up Thunderbird on a new machine exhibits the same issues. It probes the exchange server and finds the settings but continues to report a problem with the user/password credentials. Same issue with SMTP authentication. Current settings are port 587, STARTTLS, and Kerberos/GSSAPI. Right now, Thunderbird users who updated to V38 are unable to receive or send email via Exchange server.

I have several users running Thunderbird as a mail client connecting to an Exchange 2010 server. One user updated from v37 (which was working fine) on Friday before leaving work and on Monday morning can no longer authenticate to the mail server. One user updated this morning and has the same problem. No settings were changed. Those users who have not yet updated are still authenticating without problems. When launched, Thunderbird prompts user to change authentication method. Current IMAP settings are using port 143, STARTTLS and Normal Password. We have tried changing these settings and nothing works. Setting up Thunderbird on a new machine exhibits the same issues. It probes the exchange server and finds the settings but continues to report a problem with the user/password credentials. Same issue with SMTP authentication. Current settings are port 587, STARTTLS, and Kerberos/GSSAPI. Right now, Thunderbird users who updated to V38 are unable to receive or send email via Exchange server.

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Wayne Mery
Wayne Mery
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Yes, sadly a bug in version 38. It should get fixed in 38.1.0 in a couple weeks.

You can reinstall version 31 from https://ftp.mozilla.org/pub/mozilla.org/thunderbird/releases/31.7.0/win32/en-US/ and in 2-3 weeks you can update to 38. Currently automatic updates are not being done, so you should be OK after you reinstall 31.