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POP3 and IMAP clients not authenticating to local LAN connected Exchange 2010

Posted on 2011-02-11
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Last Modified: 2012-05-11
I have a small company LAN of about 50 people.  I just installed a brand new Exchange 2010 server for them.  Most of the clients attach to the Exchange 2010 server using Outlook and the Exchange protocol.  No problem.

However, about 5-7 developers use Thunderbird as their email client, instead of Outlook.  I have setup the internal certificate on Exchange with IMAP and POP3 services, but when I try to create accounts for Thunderbird email clients, I continually get an error message saying that it cannot find the security settings for the server.  Which is Thunderbird "geek speak" for not able to authenticate.  (the client is set for SSL/TSL authentication)

I also then tried setting up a POP3 account using Outlook 2010 and 2003 as a test.  And neither of those email programs would authenticate for POP3 or even IMAP either.

Is there some type of setting under Exchange 2010 that I am missing to get it to respond and/or authenticate for POP3 and IMAP clients?

Thank you in advance,
Jeff
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Question by:jgrammer42
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by:Matt V
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Have you given the user account permission to use POP3/IMAP?

# In the console tree, navigate to Recipient Configuration > Mailbox.
# In the result pane, select the user for whom you want to enable or disable POP3.
# In the action pane, under the name of the user, click Properties.
# In <User> Properties, on the Mailbox Features tab, click POP3, and then click either Enable or Disable.
# Click OK.

# In the console tree, navigate to Recipient Configuration > Mailbox.
# In the result pane, select the user for which you want to enable or disable IMAP4.
# In the action pane, under the name of the user, click Properties.
# In <User> Properties, on the Mailbox Features tab, click IMAP4, and then click either Enable or Disable.
# Click OK.
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jgrammer42 earned 0 total points
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mattvmotas,
Please forgive me for taking so long to respond.  I was not notified via email that you had posted, and did not see your response until I logged back on to Experts Exchange.

Yes.  the user(s) do have POP3 and IMAP enabled in their respective properties areas.

Thank you,
Jeff
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Author Comment

by:jgrammer42
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na
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Author Closing Comment

by:jgrammer42
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Problem was resolved via change to POP3/IMAP authentication to use clear text.
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