Here is my back ground. In the past the "Pop up" warning use to appear, then changes happened in the organization and not it doesn't happen, is this simply because Outlook 2010 doesn't support it? or is it a permissions issue on the mailbox?
I do not believe the messaging team is correct. “According to the Messaging Team, the pop up above is no longer a feature in Outlook 2010, instead users will get a declined message if the room is already booked. In this instance Outlook 2010 is working as designed by Microsoft”
You’ll notice the Situation Mgr. XXX used the words, “According to the Messaging Team” and not “According to Microsoft”. I have dug high and low and have not been able to find a Microsoft Publication citing that this “Pop-up” warning cannot be done in Outlook 2010. I would assume the Messaging team would have included such evidence in their email if they had found it. I’m certainly not trying to be discourteous to the messaging team, I’m just not convinced that they are correct without evidence from Microsoft, and I don’t want to tell my Site Stakeholders something that may not be completely true.
I have found multiple forum posts that mention a method of turning it on, while not simple, it does appear to be possible. It appears that the “Resource Booking Attendant” is working as intended, with a decline response after the invite has been sent out. However we are barking up the wrong path, the function we are looking for appears to be called “Direct Booking”, and as the messaging team has stated in the past, there is a registry fix in order to make it work for Outlook 2010. In addition to that Registry Fix there appears to be an Add-in for “Direct Booking”.
Can you anybody explain why the above solution mentioned on Experts-Exchange.com will or will not work? We are using Microsoft365 for Exchange Hosting, and using Outlook 2010