We've been struggling for the longest time to get UM working without our users needing admin rights. Inter-Tel finally gave us the answer!

You do need to install the software with admin rights so you will have to make your user a local admin temporarily but after install you can remove the rights.

After that, you need to give everyone full control of the following file:


and then the fax portions will work correctly. If the file doesn't exist yet, then create a blank one and give everyone full rights.

So far this has worked out great for us. Users don't need power user rights on their workstations and we have to deal with a lot less user installs and spyware!

I hope this helps anyone that went through this frustration.