Port 443 For Veeam Backup & Replication Is Occupied By Another Application | Required
Change this value to an available port, such as or 8443 . Complete the installation wizard. Post-Installation (Registry Modification)
To avoid port conflicts, resource starvation, and security risks, always install Veeam Backup & Replication on a dedicated server. Avoid co-hosting web servers, domain controllers, or SQL production environments on the same machine. Change this value to an available port, such as or 8443
If you absolutely cannot free port 443 due to corporate policy (e.g., another critical application must keep it), you can force Veeam to use a different port. because: Avoid co-hosting web servers, domain controllers, or SQL
Web servers installed by third-party management tools often run silently in the background. Veeam uses Port 443 for secure communication
Veeam uses Port 443 for secure communication. Changing Veeam's port requires reconfiguring all managed servers and components to trust the new port, which is complex. It is usually easier to move the other application off port 443.
If the Veeam server is also a Hyper-V host, Hyper-V might be using port 443 for VM replication. Open . Go to Replication Configuration .