What is FORMCRED cookie ?
Web Agent : v6 and above
On a POST to an FCC the FCC will generate several cookies. This includes the FORMSCRED cookie which is created when FCCCompatMode is set to the value YES. These cookies represent the old way of doing forms login and should be considered deprecated.
The functionality only exists today to provide backward compatibility with older SiteMinder installations. The FORMCRED cookie is generated from the USERNAME and PASSWORD variables. In the default mode (FCCCOmpatMode="NO"), The FCC will log the user in directly and on successful authentication redirect the user back to the TARGET URL with a SMSESSION cookie using SSO instead of FORMCRED credentials to access the TARGET.
The FORMCRED cookie is further encrypted using Agent Keys.