Windows 10: Certain Windows PCs can no longer RDP to 2012 R2 server

Have a terminal server accessed by users in various remote offices. Nearly all connect via RDP over VPNs connecting the various routers. This has been the setup for years. Recently I have a few - and only a few PCs - that can no longer connect to the RDP. They can ping the servers but refuse to connect. I have created a few holes in the central router and they can RDP via the EXTERNAL IP but I obviously do not want to keep this as a permanent solution.The PCs in question are both Windows 7 and 10. Is there a particular update or setting on the PC end I should be looking for? Alternat

:)

 

printing issue in Redircted printer in RDP server 2012 r2

host os -windows 10

printer-hp laserjet 1020

printing issue in Redircted printer in RDP server 2012 r2

 

Convert Windows Server 2012 R2 Evaluation to Windows Server 2012 R2

I have purchased the product key of Windows Server 2012 R2. Now the server is on Windows Server 2012 R2 Evaluation. I found a few links there they explained on how to convert from Windows Server 2012 R2 Evaluation to Windows Server 2012 R2 with valid product
key. One of the example is this link:

How to activate Windows Server 2012 R2 Evaluation - Nicolas Ignoto, CTP

Is this a correct way to do? If I follow this step, will my data be erased?

I want to avoid formatting/fresh Windows install because there are some software in the server that we do not know how to backup. We just want to get it activated now, backup will be sorted out later.

 

Upgrade windows server 2008 to 2012 R2 Datacenter

Boa tarde , após realizar o upgrade da versão do windows server 2008 R2 datacenter para a versão 2012 R2 datacenter , não consigo mais realizar o acesso via RDP .