Assigning a phone number to a meeting room. Doesn't show up in Voice Users

Update:  We were able to do some sort of conversion on the accounts to get them to show up under Voice Users so we could assign them a phone number.  After witing a bit, the dialpad icon eventually showed up.

However, when we try to make a call, we get a recorded error message that says something like This account is not provisioned for this service capability.

Anyone know what that means?  The accounts have the Meeting Room and Calling Plan licenses.

Thanks