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One of my customer reported a Outlook UI related issue (not Dev issue), as it bugs them having this error every time they hit the send/receive button. If they try to use Outlook 2010 Beta or Outlook 2007 SP2 generates the error below when doing a full send/receive and their client is connected to Exchange 2007 SP2.
Error: Task 'firstname.lastname@example.org' reported error (0x80190193) : 'The operation failed.'
When we just looked into this, we found its taking us close to OAB synchronization and it fails - which points to, HTTP Error 403. This problem occurred as they enabled the Secure Sockets Layer (SSL) in the OAB directory in Internet Information Services (IIS) Manager.
Customer tried the following steps, which resolved the issue.
FYI: SSL is not required on the OAB virtual directory for domain-connected clients. This is because SSL is not required to download files only. This is the opposite of the default setting for the other Exchange services virtual directories.
What happens if the issue continues after have followed the above steps?