Outlook 2011 for Mac not authenticating with Exchange 2010

Hi,
We have an issue with our Mac Clients authenticating with our Exchange Server. We have Exchange 2010 Version 14.03.0174.001. 
Outlook is saying the credentials are incorrect for the user when we know they work fine in OWA and in Outlook 2010.
It seems this is since we re-keyed are SSL certificate. I have changed the EWS directory to Basic Authentication and also re-created the EWS directory. I have also re-ran all the SBS Wizards.
Is there anything else we can do to get this sorted?
Thanks 

Hi Robert,
I found a KB for your reference:
Sending email error "Authentication failed. Error 17897" in Outlook 2011 for Mac
http://support.microsoft.com/kb/2492901
If it not matches to yours, please paste the details without sensitive information.
Thanks
Mavis
Mavis Huang
TechNet Community Support

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