Outlook 2011 for Mac Connection Problems

Posted on 2011-10-11
Last Modified: 2013-02-16
I'm having problems with Outlook 2011 on a Mac running Lion.

When I add the Exchange Account Outlook will start to download all my email and then stop, prompting me to enter my password again. The message is:

Ther server for account "" returned the error "Logon failure: unknown user name or bad password". Your username/password or secutiry settings may be incorrect. Would you like to try re-entering your password?"

I re-enter the password and it connects again and then fails again.

I have tried it with proxy settings on/off/automatic all with the same issue. The Mac connects to our wireless fine with a certificate.

We use Exchange 2010, Windows 2008 Server and everything works fantastically on our PCs!

I have seen a few references to this on the web but to no avail.
Question by:IvanhoeGrammar

    Expert Comment

    Have you configured it using an internal hostname / IP?
    Also the automatic discovery will populate the RPC over HTTP settings in the Connection tab. Check this to see if something has been populated in there and if so, if it is correct.
    LVL 28

    Expert Comment

    If you don't have this set already, make sure that in the Preferences under Account that you have chosen under Method to use user name and password and then put those in the fields provided.  The thing you really want to use is Kerberos, but OS X has always had some issues with that and it seems that MS Outlook 2011 has just exacerbated it. I started out with Kerberos as the Method, but kept running into issues with authenticating and staying connected. Since I switched to using username and password, my issues along that line have disappeared.

    Author Comment

    IT S-Support: I have confirgued it using I can't see a Connection tab so not sure what you mean there?

    jhyiesla: Not using Kerberos

    Accepted Solution

    It seems to have fixed itself with an Office update :)

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