Connect to the server using RDP.
Specify passive FTP port range in IIS Manager:
2.1. Open Internet Information Service (IIS) Manager:
In Windows Server 2012 and newer: go to Start > Server Manager > Tools > Internet Information Service (IIS) Manager.2.2. In IIS Manager, go to server_hostname > FTP Firewall Support:
Accessing the menu FTP Firewall Support
2.3. Specify the passive FTP port range in the field Data Channel Port Range and click Apply to save the changes:
Setting the passive FTP port range
Restart Microsoft FTP Service:
3.1. Open the Services snap-in:
in Windows Server 2012 and newer: go to Start > Server Manager > Tools > Services.3.2. In the list, select Microsoft FTP Service and click Restart the service: