They MIGHT have an internal team for this, but since we have our own IT department, my management has decide to take the costs internal versus paying the new vendor to set up remote access for themselves.
That doesn't really make sense as this is all questions about THEIR IT. All your team can do is get in the way 😉
Right, I have no idea WTF you think you are doing here @Dashrender.
The most you should do is setup a VLAN or actual separate LAN with no access to your network. The other company can deal with putting something on this shit old device that reaches to their support infrastructure.
No one on there side has even breathed a word about something like that.
As I previously mentioned - the old HVAC vendor did all of their own management - I only provided them an internet connection, they managed everything else.
I can see the advantages of that - time to toss this at the new vendor similarly.