pam_silly_ldap
This is my home-made pam module that does two things: 1st it converts the username to a possibly different name on the exchange server and then it authenticates the username against the imap server on exchange. The name conversion is done by looking up pairs in a gdbm file.
Where to find
I seem to have a cvs repo named 'programs' and it's the only thing in there
64 bit
It seems to build just fine, but it needs to go into /lib64/security, not /lib/security/.
A usermap file from a 32 bit box won't work. Re-build with usermap.pl