OIDC login doesn't work with mixed case domainnames, since we use the hostname.domainname for every uri as a default. And a browser always converts the hostname.domainname part to lowercase. Thus Keycloak rejects them.
Successful build Package: univention-management-console Version: 12.0.35-6 Branch: 5.0-0 Scope: errata5.0-9 b2deb80564 Bug #57679: Add yaml efa37f0a8e Issue univention/components/keycloak-app#224: Convert all urls for oidc to lowercase 50e5a449b7 Issue univention/components/keycloak-app#224: Convert all urls for oidc to lowercase All URIs set in the joinscripts are converted to lowercase for the default case
<https://errata.software-univention.de/#/?erratum=5.0x1148>