Will be doing a swing migration from Exchange 2003 to an Exchange 2010 server. We have about 100, Outlook 2003 clients, that need to have RPC over HTTP enabled when the Exchange 2010 server goes live. Is there a GPO policy, or script I can push out, so anyone with a Outlook 2003 client, gets their Outlook profile/settings changed to enable RPC over HTTP?
Also, with this being enabled, what will be the effect for users that have mailboxes on the Exchange 2003 server and the Exchange 2010 server. Will the RPC over HTTP only be available when the mailbox is on the Exchange 2010 server? What will happen if the RPC over HTTP is enabled, but the mailbox is still on the Exchange 2003 server?