On Windows 10, you can make up to 10 simultaneous Remote Desktop Protocol (RDP) connections. This can be adjusted, however, depending on the operating system edition and the type of license you have. To check the current settings on your computer, follow these steps:
1. Open the Run command (Windows key + R) and type "sysdm.cpl"
2. Select the "Remote" tab
3. Check the box next to "Allow Remote Connections to this computer"
4. Select the "Select Users" button
5. Check the box next to "Allow users to connect remotely using Remote Desktop Services"
6. Adjust the number of simultaneous RDP connections, if desired
7. Click "OK" to save the changes
If you have a Professional or Enterprise edition of Windows 10, you can purchase additional licenses to allow for more than 10 simultaneous RDP connections. For more information on purchasing licenses, you can contact Microsoft directly.