Checking and Promoting for double booking in SharePoint online calendar

Frequent Contributor

Hi all, 


Looking for a solution where there are rooms to be booked in a custom list called ROOMS where all rooms information is kept. 


The users can book rooms via out of box SharePoint Online Calendar and book rooms. However, if the same room has been booked by different users, they should be prompted that the room is already booked and preventing double-booking in SharePoint Online Calendar. 


any suggestions or sample will be highly appreciated. 


Thanks and Regards.   




3 Replies
Isn't using Exchange room lists an option?