An Azure service that is used to provision Windows and Linux virtual machines.
Hello,
#1 You can have your users login, but your Inbound rules to your VM should allow for RDP access on port 3389 for your users to connect (unless you have VPN set up).
#2 You should be fine to connect from Russia, but as far as I know you cannot purchase new services.
Microsoft suspends new sales in Russia
If this is helpful please accept answer.