Global change of Time zone

I do not believe this is possible. For user extensions one must go to the User Management/Users section of the portal and manually update each user. Might be possible to use the API to update time zones of users, but I haven't check if that is possible.

For Common Area phones, one has to do the same, though instead in Phone System Management/Users&Rooms/Common Area Phones.

Hi @Alex_z2 

You can update timezones for all users using APIs:

https://marketplace.zoom.us/docs/api-reference/zoom-api/ma/#operation/userUpdate

Otherwise, its a manual per user update