Currently, we have a requirement of the automatic update of the Active directory group from the Windchill in a define timeline for ex. once in a day.
The update is happening when we are clearing the cache for the group or restarting of the environment but not on automatic way.
Article - "How to automate Recompute Group Membership in Windchill PDMLink": https://www.ptc.com/en/support/article/CS29278
Thanks for sharing the article.
But it seems the group outside of Windchill will not be taken care of.
Are you using any external LDAP Group for testing ?