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Exchange 2003-2010 Migration - OA Error

tolinrome asked
Last Modified: 2012-05-12
Everything works except 2003 mailbox users using OA

test exchange connectivity gives:
when testing exchange 2003 user fo rrpc/http I get:

RPC_S_SERVER_UNAVAILABLE error (0x6ba) was thrown by the RPC Runtime

I did everythign I could find on the internet to try and solve this:
disabled IPV6, disabled/renabled OA, checked IIS settings, etc.

Any help?
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