setting up Zoom Room background for all room

Hi, @micknjen 

The instructions are as follows:

1. Sign in to the Zoom web portal.
2. In the navigation menu, click Room Management then Zoom Rooms.
3. Using the tabs and Search function, locate the room, floor, or location you want to apply the background to, then click Edit to the right of it.
   Tip: If you don't see the Edit button, move the current window to a wider screen or use the horizontal scroll bar at the bottom of the panel.
4. Click the Rooms Profile tab.
5. Under Setup, locate the Background image for Zoom Rooms setting.
   If there's a default image being used at the account level, you will see a preview of that image along with the "Using account setting" notification on the right. 
6. Click Upload New Image.
   Note: Verify your image follows our guidelines.
7. Select your image and click Open.
   You will see a preview of the new custom image for that specific room or location.
   Tip: Click Reset to remove your uploaded image. If there's a default image uploaded at the account level, it will replace your uploaded image.

Source: https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0063442