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

If a third-party service allows it, reconfigure it to use a different HTTPS port (e.g., 8443 or 9443). Temporary Disabling

Open and run:

: Frequently uses 443 and may need to be uninstalled or moved to a different port. If a third-party service allows it, reconfigure it

When you install Veeam Backup & Replication (version 10, 11, 12, or later), the installer attempts to bind the to port TCP 443 on the local machine. If any other process has already claimed that port—even if it's just listening and not actively serving traffic—Veeam will refuse to start or install. If a third-party service allows it

Visit the Veeam R&D Forums or contact Veeam Support with the output of veeam_backup_service.log and the results of your netstat analysis. If a third-party service allows it, reconfigure it

: Virtual desktop infrastructure agents or management tools.