How to force ADFS to pass all credentials as lowercase

Hi,

I have a relying trust in ADFS setup for a SAML 2.0 application.

The issue I have is that the NameID attribute required for the claims rule relies on the Name field in AD. Some of the Name fields have mixed case, some have all uppercase and some have all lowercase. The SAML app requires all credentials to be passed as lowercase.

I would like to know if there is a method to transform the credentials to lowercase via the claims rules or failing that do I have to edit one of the xml files in the /adfs/ls directory tree or is it not possible?

Regards

Lionel