There is a config option in the AD config called use.sso. Just set it to true.
I just tried that and it's working fine. If you want to take this offline you can contact me directly to help me reproduce it.
Is that directory writeable? I just tried this and it is working in my test environment.
smart phone my calender in day mode loads new booking no scrolling
Fixed for 2.6.7
reservations allowed in days without permitted hours
I cannot reproduce this. I can't even select a time on a day that is blocked. Do you have midnight selected? That is the break between Saturday and Sunday