Mysterious replication

Anyone come across and issue with random replicas created on an admin hub when users are registered on a regional spoke server? replication settings are fine and when a user is created, admin4 shows an “accelerated create replica” created on the admin hub in an admin4 created document.

Subject: check your admin preferences

File>Preferences>Administration PreferencesRegistration tab

Mail Options

Advanced Mail Options

“Create Replicas of mail database”