Have you checked to make sure network pipes are turned on for the replication server?

Kenneth,

I tried

exec sp_msforeachdb "IF EXISTS (select name, suser_sname(sid) from sys.sysdatabases where suser_sname(sid) IN ('domain\one', 'domain\two')) BEGIN USE ?; sp_changedbowner 'sa' END"

and got error

The identifier that starts with 'IF EXISTS (select...

Forgot to mention, third party tools are not an option and we have nobody in house with any Powershell knowledge.