The term "office manager" is too general and does not indicate the size of the office, the work profile of the individual, or the Key Result Areas (KRA) of the person. In general, any office manager must be a role model for the office and their team members. Therefore, they must excel in general management, including time management, communication skills, and leadership skills.
The specific functional skillset requirements would largely depend on the job profile being handled. For example, if the office manager is in charge of a branch office, they serve as a key link between the branch and the head office. In this capacity, they must be competent in accounting, inventory management, and coordination. On the other hand, if the person is an office manager responsible for the facilities of the head office, the functional requirements would depend on the type of facilities they have to oversee.
I trust that I have provided you with an appropriate response.
Regards