To access machines remotely via MeshCentral, make sure you have already set up your account:
How do I set up my MeshCentral account for remote access?
Once you have set up your account, you may proceed.
Enter the 2FA code from your Authenticator App, optionally check the Remember box.
Inside, find the machine of your choice and click on it.
Click the Desktop Tab, then Connect:
Click Send in the bottom left to get past Ctrl+Alt+Delete prompt:
Now enter your windows Login.