Hiding user accounts within booking system dropdown list

[computer_expert]

First off, Thanks Nick for the brilliant software!

 

Is there any way to to hide user accounts from the 'User To Book For:' drop down list in the booking system?

 

It's just that some of the OUs have template users/test accounts that clutter up the list. Moving the user accounts isn't really an option at the moment

[computer_expert]

I forgot to add that I'm running server 2012 (not R2) and HAP 10.1 with the booking system plugin listed under v10 on the download page.