What operations fail if the WAN is offline, but the RODC is online in the branch office?

If the RODC cannot connect to a writable domain controller running Windows Server 2008 in the hub, the following branch office operations fail:

• Password changes
• Attempts to join a computer to a domain
• Computer rename
• Authentication attempts for accounts whose credentials are not cached on the RODC
• Group Policy updates that an administrator might attempt by running the gpupdate /force command.