Server 2008R2 Fax Server

Server 2008R2 Standard Server - DC
Workstations:  Windows 7 x64 - Domain users
Modem US robotics USB modem

Message when trying to add account: you do not have security permissions to complete this operation. Contact your administrator for more information.

I had a working fax server in a production environment that had been working for years.  On Tuesday users were unable to send faxes.  Faxes still were being received and placed in a folder.  

When looking at the Fax Account it showed Disconnected.  After removing that and trying to reconnect, I got a message saying that I did not have security permissions.  

I tried it from the fax server itself.  It works.  I tried it from the workstation using a Domain Admin account that we use and it works.  I temporarily made the user a domain admin logged out and logged back in.  Still cannot connect to fax server.  

Other things that I have done.
uninstalled/reinstalled modem on server
Removed Fax Server Role and re-added
Took ownership of Fax in the Advanced Security section by domain users
Removed fax on server from workstation and re-added successfully
Re-added permissions in the fax manager for domain users, network service, everyone
Disabled Windows Firewall on server
Disabled Antivirus on server
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Lionel MMSmall Business IT ConsultantCommented:
Sounds like a bad modem. I know that you would think it would not work at all if that is the case but I have seen this myself before and the only thing that I could do to fix it was to replace the modem with a new one. You want to go to and type in modem in the search bar to see which one are certified for Windows Server or you can go to a site like or bestbuy and search for modem that list 2008 in their compatibility list
Larry Struckmeyer MVPCommented:
If there is a Windows Server 2003 DC on this network you have a patch mis-match/missing.  Don't fret, this caught everyone who patched early.

notice the V2 under details.

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accudata1TechAuthor Commented:
I do have a 2003 DC on the network.  That patch fixed it.  Thanks
Larry Struckmeyer MVPCommented:
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Windows 7

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