Email templates and document templates cannot be assigned to another user, but are owned by the person who has made these (or imported these).
When you use organizational based templates and using an authorization role for the Templates where the read privilege is not set toe organization, some templates will not be visible.
There are two solutions for this problem:
- The person who makes the templates must be in the same Business Unit as the users,
- The read privilege of each template authorization must be on organization level
The last solution has my preference.