I migrated from Exchange 5.5 to Exchange 2003 from an NT 4 Domain to a Windows 2003 domain. The Exchange 5.5 server was removed. When using Outlook 2003, If a user is logged onto the old domain and tries to download the OAB, they get the following error:
Microsoft Exchange offline address book 0X8004010F
If the user is logged onto the new domain, it works fine. Also it seems users from the old domain are trying to download an OAB called "Download Offline Address Book" while the users on the new domain are downloading "\Global Address List".