Problem:
Once a UMC or portal link is created, it persists in the profile. Even after removing the links (refer also to here), the links are not removed for existing users, although they are not created for new users.
Solution:
Instead of explicitly removing the link from the profile, we address it in the netlogon script. Utilizing a find command, existing links from profiles can be removed:
find /home/ -type f -name "Univention Management Console.URL"
Once certain of identifying the correct link, add “-delete” to remove it.
find /home/ -type f -name "Univention Management Console.URL" -delete