I have a VM instead of UCM but....
It's working for me. It calls all the parties. It will send emails to everyone if you have the SMTP settings configured in one-x. I switched my one-x to App Server so I could do web collaboration too. That also is working.
I found a bug on my install related to entering a pin, it is supposed to ask the people to enter the conference PIN number but the module "REQUESTPIN" doesn't exist on VMPro so it just tells you how many voicemails you have (like dialing *17). I found that that was a bug in the beta that was supposedly fixed, but it ain't working for me and so far no one has commented on my questions about it. Next step will be to open a ticket for one of my customers on the subject.
Some noticed aspects:
1. Minimum 15 minutes in length.
2. During those 15 minutes your Meet-Me conference is dedicated to this purpose.
3. The email that comes is supposed to be an event to add to a calendar. That isn't working in Outlook (wonder if it is an outlook setting), worked but looks awful in Thunderbird/lightning.
4. The Outlook plugin version is better than the web interface version. (1 minute increments when scheduling for starters)