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

Sometimes, the port is reserved by the system’s HTTP driver ( http.sys ).

Sort by the column and find the number you identified in the previous step. This will tell you exactly which .exe is hogging the port. 2. Common Culprits and How to Move Them

Look for the line that says LISTENING . The number at the far right is the . The Visual Way (Task Manager): Open Task Manager and go to the Details tab. Sometimes, the port is reserved by the system’s

Are you seeing this error during a or did it suddenly appear on an existing server ?

Go to Edit > Preferences > Shared VMs . Click Change Settings , then either disable sharing or change the port to something else (like 4443). B. IIS (Internet Information Services) The Visual Way (Task Manager): Open Task Manager

Open the IIS Manager, go to Bindings for your sites, and either remove the HTTPS binding or assign it to a different IP address or port. C. Windows Global HTTP Settings

While you can technically change the ports Veeam uses, for many of its core components (like the Veeam Backup & Replication console and the REST API). including communication with the backup server

Use the command netsh http show servicestate to see which registered endpoints are active. 3. Can You Change the Port in Veeam?

Changing Veeam’s default ports often leads to a "domino effect" of connectivity issues across your proxies and repositories. 4. Re-running the Veeam Setup If the conflict happened during installation: Stop the conflicting service. Click Retry in the Veeam installer.

Veeam uses Port 443 (HTTPS) for various critical tasks, including communication with the backup server, cloud gateways, and managing VMware vSphere environments. When another service grabs this port first, Veeam can’t bind to it, bringing your backup infrastructure to a halt. Here is how to identify the culprit and fix the conflict. 1. Identify Which Application is Using Port 443