Add department

Sign in to the Zoho One Admin Panel.
Go to Groups, then click Add Group.
Enter the department's Name, Description, and Email Address. The department email address will act as an email alias for all the employees in the department.
Choose Department under Type.
Assign the Department Head, and add Members, Moderators and Followers to the department.

Department Head: Usually, an employee cannot be a Member in more than one department. However, a single manager might supervise multiple departments, and might need updates from all those departments. Those managers can be assigned as the Department Head in all the departments they oversee.
Moderators: Moderators can add or remove memberss and manage department settings.
Members: Members are the non-privileged employees present in the department.
Followers: There may be cases where an employee might need to be part of multiple departments. For example, support agents might need to stay in touch with the Production and Management teams in order to keep their knowledge bases updated. In those cases, the employee can be added to additional departments as a follower. They will have access to all the resources of the additional departments, but will only be considered a Member of their primary department.