: 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 is the cause, go to Hyper-V Settings > Replication Configuration and change the port from 443 to another value (e.g., 444). : Open a command prompt as administrator and
If is using the port, you can change its binding via the IIS Manager (InetMgr.exe) by selecting "Edit Bindings" for the website and changing 443 to a different port. If is using the port, you can change
To resolve the conflict, you must first identify which process is currently using port 443. Note that Veeam v13 services will still fail
: 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.
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
: Use the command Get-NetTCPConnection -LocalPort 443 to find the associated PID.