What are some reasons for the remote server does not exist or has not been designated as a valid Publisher error? My subscriber is giving me this error when I try to synchronize a merge subscription. It's failing when it tries to connect to the distributor. The subscriber is running SQL Server Personal SP3a and the publisher is running SQL Server Enterprise SP3a. The publisher and distributor are on the same box. I'm using a wireless Internet connection and I can register the publisher server from the subscriber and access it's data. On both boxes, I used the client network utility to use TCP/IP and I set an alias for the actual name of the server and the server name is the IP address. I also added the publisher as a remote server on the subscriber. What am I missing???