CAS for Multi-Domain Services

[Anson Henthorn]

I recently attended the JA-Sig Unconference and it was great.  I enjoyed
learning the direction that uPortal and CAS were going.  As I am new to both
applications, I have a few questions that I hope someone here can help me
with.

First, we have successfully configured CAS to work with our LDAP server (for
the sake of future argument, let's call this LDAP1) and with a single
service.
The problem is that we need to configure CAS to work with a secondary LDAP
source (LDAP2) that has a completely different user naming convention than
LDAP1.  All services are already using the same user naming convention as
LDAP1.

I can easily setup a MySQL db to define the mapping between the LDAP2
username and the appropriate service username. However, how would I
configure CAS to authenticate using LDAP2 username, then query the db to
retrieve the correct username, and then pass it to the appropriate service?

Any direction on this is greatly appreciate!
Thanks,
-Anson
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