Replication Error - Login Failure

When setting up replication you might get an error saying login failed.

This will show up in the SQL Error Logs as:

Login failed for domain\username

Followed by

Error: 18456, Severity: 14, State: 6

The error code means that a windows log-in was entered in the place of a SQL log-in. In the case I had it was in the Log Agent Reader security.

In the section connect to publisher I had entered a windows service account (although it says quite clearly here: using the following SQL Server Login). I didn’t see this though as I added replication through a script which I had adapted.