Hello Nenad Petrovic,
Thank you for posting your query in the Microsoft Q&A Community.
Below are the steps to complete the process depending on the role
- Review your current Co-Administrators
- Remove Co-Administrators that no longer need access
- Replace existing Co-Administrators with job function roles
Follow this link to see the step-by-step instructions on how to achieve this.
Let me know if you need more clarification.
Babafemi