@ScottHickman, I believe you are right. Our practice is to use VPN based on the routers. Most of the time we are also the one who sets up the routers and network. MAS definitely does not like invalid printers.
@WayneSchulz, If the issue is with clients sharing printers on the TS, there is a setting in each workstations TS client to stop this.
If the issues is they are getting errors on the server when they try to change Fax in company maintenance, it appears the Fax printer is not valid from where they are trying to change it. Determine if the Fax printer acutally works outside of MAS.
If the issue is intermittant due to the VPN dropping regularly, I am not sure why they haven't had issues before.
Something has to have changed if this was working before. New Workstations or update TS clients? Changes in the VPN structure if there is one? New Fax Printer? Is there a local working queue for the Fax Printer on the TS?