Ref: Outlook 2003/07/10 with RPCClientAccessServer
http://technet.microsoft.com/zh-tw/magazine/ff626260.aspx Client Creation Q: Do you have any best practices to share for creating an Exchange 2010 CAS array in an Active Directory site? A: I’d advise you to create the CAS array before you make any Mailbox databases or move any mailboxes to an Exchange 2010 Mailbox server in a site. Exchange 2010 Mailbox databases have an attribute called RpcClientAccessServer. If there’s no CAS array in the Active Directory site when the database is created, this will be populated with the server FQDN of an Exchange 2010 CAS server in the Active Directory site. If you create the CAS array before any Mailbox databases, this attribute will instead be given the FQDN of the CAS array as shown in Figure 2. Figure 2 RpcClientAccessServer attribute on a Mailbox database. Why is this a good idea? The Outlook client (whether Outlook 2003, 2007 or 2010) won’t pick up the change automatically. If you use Outlook 2007 or 2010, you can have ...