Link - Required Port 443 For Veeam Backup Replication Is Occupied By Another Application

: If the conflicting application is only needed occasionally, stop the service, complete the Veeam v13 upgrade, and then attempt to restart the other service. Note that Veeam v13 services will still fail to start if the port is occupied later.

: Open a command prompt as administrator and run netstat -anob | findstr :443 . This will display the Process ID (PID) and the name of the executable using the port. : If the conflicting application is only needed

When upgrading to or installing , many administrators encounter the error: "Required port 443 for Veeam Backup & Replication is occupied by another application" . This occurs because port 443 is now hardcoded for the mandatory Veeam REST API Service and Web UI in version 13 . Why Port 443 is Required This will display the Process ID (PID) and

: Veeam recommends installing VBR on a dedicated server to avoid port conflicts with other web-facing applications. Troubleshooting Connectivity Why Port 443 is Required : Veeam recommends

: Frequently conflicting services include IIS (Internet Information Services) , Hyper-V Replication , Remote Desktop Web Access , or third-party security agents like Qualys . Solutions and Workarounds

Major Issues After Upgrading to Veeam V13: Port 443 Conflict