* Passive voice requires a verb that can be acted upon. "Come" is an intransitive verb, meaning it doesn't take a direct object. You can't say something *does* the coming.
* Passive voice often emphasizes the receiver of the action. There is no clear receiver of the action in the original sentence.
Possible alternatives to express a similar meaning in the passive voice:
* "You are requested to come to my office." This uses a passive construction and emphasizes the request.
* "A request is made for you to come to my office." This is more formal and impersonal.
It's generally better to avoid passive voice unless you have a specific reason for using it. In this case, the original sentence is clear and concise.