I have an on-prem system.
Version 7.0.1, have also tried 7.10.0
External Postgresql Database
ADFS 2016
User created in AD
Acounts and groups are synced via LDAP.
Try and login via SAML, the process flows through, the user is created in the Mattermost system, the user ends up back at the login page.
I have the standard described Claims and transforms
Claims
E-Mail-Addresses → Name ID
E-Mail-Addresses → Email
sAMAccountName → Username
Given-Name → FirstName
Surname → LastName
Transform
Name ID → E-Mail Address