Archive for the ‘Outlook 2010’ Category

Outlook Anywhere not working in Exchange 2010 SP1?

July 14, 2011 Leave a comment

Had the following a few times now – Outlook Anywhere not working for Exchange 2010 SP1 when the Authentication method is set to Negotiate.


Event logs show the following;


Process information:
    Process ID: 5200
    Process name: w3wp.exe
    Account name: IIS APPPOOL\DefaultAppPool
Exception information:
    Exception type: ConfigurationErrorsException
    Exception message: Could not load file or assembly ‘WindowsLiveID, Version=, Culture=neutral, PublicKeyToken=283dd9fa4b2406c5’ or one of its dependencies. The system cannot find the file specified.


In short, change from Negotiate to NTLM as Negotiate introduces the WindowsLiveID provider, and this causes Outlook to fail authentication (in short).


If NTLM is already enabled (or Basic) then make sure that the WindowsLiveID provider isn’t being inherited (look in IIS Manager under /RCP in the “Modules” bit Smile