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

When upgrading to Veeam Backup & Replication (VBR) v13 , many users encounter a critical installation block:

After some discussion with the team, they decided to move the Acme Secure Gateway to a different server and change its configuration to use a different port. They also updated the Veeam configuration to use a new port, and everything was back to normal. When upgrading to Veeam Backup & Replication (VBR)

If you’re attempting to install or upgrade to , you may encounter a blocking error: "Required port 443 for Veeam Backup & Replication is occupied by another application." This happens because Veeam v13 now requires port 443 for its API Gateway and Web Service . This is the most common fix

This is the most common fix.

If Internet Information Services (IIS) is occupying the port: When upgrading to Veeam Backup & Replication (VBR)

If netstat shows the Veeam Backup Service (e.g., Veeam.Backup.Service.exe ) on port 443 but the installer still complains, you may have a stale installation. In that case: