Exchange account display names reversed or incorrect

Hello,

I just moved my client/your client to your Exchange services, which mostly works great. However, several of the user account names are displaying either completely wrong or with their first and last names reversed with a comma.

For example:  Jennifer Smith's user account, shows up in her customer mailboxes as "Jennifer, Smith", which is of course incorrect format.  It should be either "Lastname, Firstname", with comma, or "Firstname Lastname", without comma.  It's very frustrating for her because it looks so unprofessional. 

Some users have been renamed so they can use the same mailbox when they took over from an ex-employee. Those accounts are showing the old user's name when sending outside the organization.

I manage other clients with their own Exchange servers, and I know where their properties are to change these issues (and how to run the Recipient Update Services), but I have no access to this on the Comcast system.  The names are set correctly, and have been reset several times in the control panel.

FYI, I tried calling tech support on this, and the nice lady I spoke with obviously didn't understand anything about the Exchange services and kept telling me "You change that in Outlook, check your accounts settings."  Anyone using an Exchange account knows you can't do this at the Outlook client level, its done at the server.

Its very frustrating being an IT support person myself. Usually, if I have to call support, I am beyond tier 1 support already. But when they wont forward me to to Tier 2 to correct the issues (by taking to someone who understands the systems in the first place!) its difficult and frustrating, especially for my client.

I've seen some closely related issues posted on the forums here, so I was hoping I'd have better luck requesting help in this matter.  Thanks for any help!

Greg