I am attempting to integrate GroupWise 8 Webmail with Open SSO and while I can pass the username with header label "User.login" I can't seem to get WebAccess to accept the "User.password". I tried encoding the password in base64, and that also seems to not work.

1. Am I using the right header labels?
2. When I encode the password if I need to encode the password do I need to include the username (ex:User1:Password1) or do I just encode the password (ex: Password1)?
3. I am currently using the standard Templates, do I have to create a custom Template to make this work?

Anyone that done this, help would be greatly appreciated.