Oracle 32 bit and 64 bit client and OS Authentication issues

So this might be an off the wall not likely to be normal scenario.. but..  We have developers who have 64 bit machines with 64 bit installs of Office products (which they use to pull in data into excel).  We create user accounts in our oracle database using external authentication to our Windows AD domain, and when using sql developer they can click os authentication using the client and log in no problem.  They just started getting involved with Crystal Reports which only uses the 32 bit clients, which after digging I found the proper way to install both clients