Windows 10 Update & Domain & WSUS

We recently switched our main software provider.  Usually the software we will use will be installed on each computer and we will run it to connect to their systems.  With this new company, we have to remote into their application server with RDP and then launch their software.  We are constantly getting dropped from RDP.  We have around 75 computers remotely connecting to this machine over a VPN.

I'm sitting here watching our bandwidth meter and we're not even hitting 50%.  The support rep I'm dealing with at their company is telling me that he think's the cause is our bandwidth.  I'm arguing with him telling him I don't think it's that and I think it's an issue on his side with their server not having enough resources.

He think's that Windows 10 is being downloaded to all of our machines and that's eating our bandwidth.  We are on a domain and I also have WSUS set up.  We also have 2 internet connections. and are both blocked on all our workstation subnets, and only allowed on the subnet with the WSUS server.  He's telling me that no matter what all computers are downloading windows 10, domain or not and are then using P2P to distribute it.  I told him that our Sonicwall is blocking P2P, his response is "Microsoft is pushing out the P2P updates from Port 80 so you cant block it."

Am I the idiot?
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Can you show him your bandwidth meter or show them a screenshot?  It's absurd for them to argue against something scientific.

From what I understand and read W10 updates are not downloaded automatically in a domain environment.  There was some discussion on this here in EE.

"Domains are blocked from receiving the "reserve Windows 10" app." -

"The Windows 10 upgrade reservation notification icon will not show up for those with Windows 7 and 8 versions for a number of reasons. Those include: The device is domain-joined."  -
Seth SimmonsSr. Systems AdministratorCommented:
Am I the idiot?

no, he is
as mentioned, the free windows 10 upgrade is not available for everyone including systems on a domain and enterprise versions of windows.  it is also not available through WSUS.  no idea what he is referring to about pushing P2P updates over port 80.  the free upgrade is targeting for home users, not the workplace

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Windows 10

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