Exchange 2010 migration from 2003 Offline Address Book issue

I am in the middle of migrating our mail server from exchange 2003 to exchange 2010.
I have moved over some test mailboxes, mail is flowing fine, and I can see the servers from the managment consoles.
My client PCs are currently on Outlook 2003 (one of our LOB apps is not compatibile with 2007 or 2010 but we are upgrading the LOB app soon)
When users hit send and receive they get the following error

Task "Microsoft Exchange Server" reported error (0x8004010F):'The operation failed. An object could not be found".

I am pretty sure this is happening when trying to download the address book.

Any please?
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MegaNuk3Connect With a Mentor Commented:
You need a PF database on your exchange 2010 server, then change the OAB to be generated on the E2k10 server.

Make sure the mail store the user is on is assigned an OAB and a PF store that contains a replica of the OAB PFs
infradatelAuthor Commented:
Ah ha thanks very much, I just had to create the offline address book on the exchange 2010 server all the other work was done :)

No problem, thanks for points.

Is Outlook happy now when you try download the OAB?
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