Required Port 443 For Veeam Backup Replication Is Occupied By Another Application Link [NEW]

: 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

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 Why Port 443 is Required : Use the

: Use the command Get-NetTCPConnection -LocalPort 443 to find the associated PID.

: 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. : Veeam recommends installing VBR on a dedicated

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

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. stop the service

In Veeam v13, port 443 is used for the . If another service is already listening on this port, the Veeam services will fail to bind, preventing the VBR console from starting or the upgrade from completing. How to Identify the Conflicting Application

If is the cause, go to Hyper-V Settings > Replication Configuration and change the port from 443 to another value (e.g., 444).