Exchange 2010 : Offline address book --> 500 - Internal server error.

The error that I faced today was a problem about Offlin Address Book between Outlook 2010 and my Exchange Server 2010.

When i try to download OAB from Outlook 2010, The send/receive progress stay blocked on Processing.

I browse the internal address configure i had configure and i get a 500 internal error from the server.

The solution
I had to reset correct permissions on C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\OAB Folder and everithing came back to normal operation.