Exchange 2003 SP2 trying to access SP1 accounts

I am in the process of implementing new Exchange 2003 SP2 servers. when I sign on to OWA from the new server and sign on as an account that is still on the old SP1 servers, the screen does not display properly and there is a message in the email window that just says:  Loading...

Any ideas on how to get an Exchange 2003 SP2 OWA server to properly display SP1 accts.

Thanks,

Scott
wendelinaAsked:
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SembeeConnect With a Mentor Commented:
There will be issues. Microsoft state that frontends should be upgraded first, and when I have stuck to that policy I have not had any issues.

Simon.
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SembeeCommented:
Should be fine.
Are you on a frontend/backend scenario?
If not, then it should be redirecting you to the server where the mailbox is located.

There is a good article from MSKB on troubleshooting the loading message.
http://support.microsoft.com/default.aspx?kbid=280823

Simon.
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wendelinaAuthor Commented:
I have 1 front end and two back-end servers. both in the old sp1 and in the new sp2 servers.
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SembeeCommented:
Is the frontend server on service pack 2 for Exchange 2003?

Simon.
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wendelinaAuthor Commented:
I have 3 servers on Exchange 2003 SP1, 1 FE and 2 be (Old servers)

I have 3 servers on Exchange 2003 SP2, 1 FE and 2 BE (New servers)

I haven't been able to find anything on the KB article yet to help.
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SembeeCommented:
Are these servers in the same Exchange org?

Simon.
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wendelinaAuthor Commented:
yes
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SembeeCommented:
All of your frontends should be at the same service pack level. The rule of thumb is that frontends should be the same or higher as the backend servers they are serving.

Simon.
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wendelinaAuthor Commented:
so you are saying that an SP1 FE server cannot open an account on an SP2 BE server.
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