When you issue the REMOVE REPLSERVER command, the replication server that you specify to remove is in use by an active replication process. You cannot remove a replication server that is used in an active replication process.
The command is stopped by the server.
Issue the QUERY PROCESS command from the source replication server or the target replication server to identify active replication processes. Issue the CANCEL PROCESS command from the source replication server to stop the replication process. If running this command on a target replication server, log on to the source replication server and issue the CANCEL PROCESS command. When the replication process stops, reissue the REMOVE REPLSERVER command.