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I would also check the domain suffix in your NIC. &nbsp;If that is gone, your Exchange server may not able to see your global Catalog
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I would also check the domain suffix in your NIC.  If that is gone, your Exchange server may not able to see your global Catalog

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You do not disable ipv6 on exchange 2010 as this will break it. Did you create a legacy URL internally and externally? Did you also create autodiscover?
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You do not disable ipv6 on exchange 2010 as this will break it. Did you create a legacy URL internally and externally? Did you also create autodiscover?

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Everything works except 2003 mailbox users using OA<br />
<br />
test exchange connectivity gives:<br />
when testing exchange 2003 user fo rrpc/http I get:<br />
<br />
RPC_S_SERVER_UNAVAILABLE error (0x6ba) was thrown by the RPC Runtime <br />
<br />
I did everythign I could find on the internet to try and solve this:<br />
disabled IPV6, disabled/renabled OA, checked IIS settings, etc.<br />
<br />
Any help?
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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?

Exchange 2003-2010 Migration - OA Error

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.