You can restrict the assignment of certain groups. This allows you to specify that these groups are excluded from synchronization (CSV, API), for example.
Go to the admin area and click on Groups. Select the group you want to exclude and edit it using the pencil icon.
You can define the exception under Restrict assignment:

- Unrestricted (default): No exceptions.
- Manual: The group is not assigned by employee import/sync, but can only be assigned manually.
- Employee import: The group is assigned exclusively by employee import/sync and cannot be assigned manually to imported persons. Please note: This applies to employees who are listed in the import list. The groups can still be assigned to users who were created manually.