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Ohh and I can confirm that in the EMC on the 2010 server, it shows my 2003 server as owning the OAB and it being the default. 
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Ohh and I can confirm that in the EMC on the 2010 server, it shows my 2003 server as owning the OAB and it being the default.

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Hello,<br />
I've recently setup a new Exchange 2010 server, moving fro ma 2003 environment. &nbsp;I have mailboxes on both servers and are currently slowly migrating mailboxes.<br />
<br />
With that, I have ran into an issue with the Offline Address Book. &nbsp;Any user who is on the new server is unable to update the OAB - we get &nbsp;'The operation failed. An object could not be found' along with the a generic error code 0x8004010F. &nbsp;<br />
<br />
From what I've read, we need to keep the address book on the EX03 box until all mailboxes are moved. &nbsp;I have not created an OAB on the new 2010 server. &nbsp;BUT! &nbsp;If I open my address book properties in outlook (2010), it is in fact pointing to the new server.<br />
<br />
So the, question, how can I point my users on the new 2010 server to my 2003 server? &nbsp;Or can I create a second OAB on the 2010 server and point the clients to that?<br />
<br />
Cheers<br />
JJ
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Hello,
I've recently setup a new Exchange 2010 server, moving fro ma 2003 environment.  I have mailboxes on both servers and are currently slowly migrating mailboxes.

With that, I have ran into an issue with the Offline Address Book.  Any user who is on the new server is unable to update the OAB - we get  'The operation failed. An object could not be found' along with the a generic error code 0x8004010F.  

From what I've read, we need to keep the address book on the EX03 box until all mailboxes are moved.  I have not created an OAB on the new 2010 server.  BUT!  If I open my address book properties in outlook (2010), it is in fact pointing to the new server.

So the, question, how can I point my users on the new 2010 server to my 2003 server?  Or can I create a second OAB on the 2010 server and point the clients to that?

Cheers
JJ

Exchange 2010 OAB Issues in Coexistance mode

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