Ok, so I'm installing an OES sp1 server, and I'm at the point where it
says "eDirectory Configuration - Existing Tree Information."

I supply credentials and it says "Credentials Failed to validate
<credentials> Do you want to continue anyway?"

I can fire up iManager on the server that I'm trying to authenticate
against, and log in to iManager with the credentials I'm using without a
problem, so I know I've got the right name and password.

The only thing I can think of that's unusual is the password is long (20
characters), but other than that it should work.

Any ideas?