For Windows Server 2012 server, you can use iis7 remote desktop management to log in to these two users remotely by default. Multi-user remote login can be realized by installing and configuring the remote desktop session host and remote desktop authorization in the remote desktop service.
Remote Desktop Service is a server role composed of multiple role services. In Windows Server 2012, remote desktop services include the following role services:
The “Remote Desktop Services” server role in Windows Server? 2012 provides technology that allows users to connect to virtual machines, RemoteApp programs, and session-based computers. With Remote Desktop Services, users can access remote connections from the corporate network or the Internet.
By default, Windows Server 2012 can only provide remote desktop login for two users. This can be achieved by installing the remote desktop session host and remote desktop authorization in the remote desktop service and configuring them. Multi-user remote login. The following introduces how to configure the remote desktop session host and remote desktop authorization, and how to activate the license server by obtaining a license from Microsoft.
1. Install Desktop Session Host and Remote Desktop Authorization
1.1. Click the server manager icon in the lower right corner of the desktop, open “Server Manager”, click “Add Roles and Functions”, select “Based on Role or function-based installation”, the following installation interface appears
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1.2. Click directly on the bottom border step.
1.3. Select remote desktop service, Click Next. 
1.4. Click in the wizard interface Next step.
1.5. In the remote desktop service role Click Next in the installation wizard.
1.6. Choose “Desktop Session Host” and “Remote Desktop Authorization”, click “Add Function” in the pop-up window, and click Next.
1.7. In Choose to install on the following interface. After the installation is complete, the following interface prompts that you need to restart the server. Click Close on the following interface and then restart the computer.