...
are using userPrincipalName for the EPPN. If you decide to use sAMAccountName over UPN, the sAMAccountName doesn't have the domain information by default and this is required to insure you user id's are unique. To add your domain information to the sAMAccountName do the following.
Select Formatted String from the "Value type" Use the below example, replace college.edu with your domain name.
[sAMAccountName]@college.edu
For cccId the schema is https://www.openccc.net/saml/attributes/cccId
...