Not possible unless you are replicating Reservations NSF . . .

HCL Notes/Domino 8.5 Forum (includes Notes Traveler)

Subject:

We recently went through a 6.5x to 8.5x upgrade and had some staff reporting they thought they could make duplicate bookings, but they did not know that although you can save a new booking document that appeared to be a conflict, it is not, as (new version) of the Resource Reservations system has not 'approved' the booking. It took a while to get folks to understand the new way the system works . . .

Assuming that there is a single replica instance of your Resource Reservations database, then you cannot double book (in R7 & later): When a booking is created directly in the reservations database, it is initially saved with a pending status ('Waiting System Approval'), awaiting processing by the RnRMgr task. RnRMgr then decides if the booking should be accepted. Bookings are processed in a queue by RnRMgr, thus you cannot double book.

Have a look at this: "Rooms and Resources design in Lotus Notes/Domino 7" http://www.ibm.com/developerworks/lotus/library/rr-nd7/

This may also help: "How to upgrade the R&R database from a Domino 6 to a 7 or 8 release
" http://www-01.ibm.com/support/docview.wss?rs=899&uid=swg21363903

Note that there is an issue with legacy R6.x bookings of a certain shape, that you may suffer from for a while (we do now & then and have a View/e-mail Agent to spot them; when we get them we delete the booking and re-create): http://www-01.ibm.com/support/docview.wss?rs=899&uid=swg21255213

Hth.

Feedback response number WEBB883GB3 created by ~Chris Quetwebergettu on 08/06/2010