We have a two-server configuration where the distributor and subscriber
reside on the same physical server, and the publisher resides on
another. Recently, two of our jobs responsible for recreating UDA
replication have been receiving the following error:

Msg 18483, Sev 14: Could not connect to server '<distributor/subscriber
server name>' because '(null)' is not defined as a remote login at the
server. [SQLSTATE 42000]

This is a little different than the much-discussed 'distributor_admin'
not being defined, for which the solution is to make sure that SQL
Server i using the correct server name (such as SELECT@@Servername).

Any help would be appreciated =D

-Scott