Your osConcert will be installed on a server somewhere and will be accesable in a browser by all visitors but what if you don't want to sell to the general public but you want your Box Office Staff to continue to make reservations?
You can read more about the Box Office Method in this FAQ category
All Event Pages can be accessed by a Box Office Agent when the event is INACTIVE in Admin>Concert Details
First we need to enable a shop setting Admin>Quick Links>SP Settings>
I know it's not a good description for what we want but it does allow visitors to see the associated message in the same settings page
However, now visitors will see the message Sorry, the event is over......Box Office can see the whole page and continue to view it and make orders. The only challenge is that you will need to know the full URL address of the event because it will not be in any menu avaialable.
Usually and Event URL is like this index.php?cPath=123
You can find the cPath of an event in your Admin>Products page e.g ID= 13