I did install fresh win10 on another 2laptops, to test this, fresh installation of 12 from above mentioned link.

Hello for your reply, today I checked with colleague of mine, he had installed only tv12 on his laptop, never did downgrade/upgrade like me, logged with company credentials and connected to the same machines as I tried with no problem. Now, your license is activated on your device and you should be able to connect. Or, you can also call your customer support and ask them to send it to you) This is why the ID activation is probably the solution to your problem.ģ) Enter the license key which is on your TeamViewer invoice (you might have to ask your accounting department if you don't have the invoice. This means that even if you are logged in with your corporate e-mail (TeamViewer account), if the license is not activated on your device (TeamViewer ID), then you are still running on the free version. With TeamViewer 12, licensing is ID-based and not account-based. Therefore, I recommend activating your TeamViewer 12 license on your device just to be sure. My suspicion is that your company's TeamViewer 12 license is not activated anymore (as you uninstalled, reinstalled Windows etc.).

Teamviewer 12 download error