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

One of the most frustrating errors encountered during the installation or upgrade of Veeam Backup & Replication (VBR)—particularly in newer versions like v13—is:

On the page, locate the Veeam Backup Management Port field. One of the most frustrating errors encountered during

Open IIS Manager, select the Default Web Site, click Bindings in the right-hand panel, edit the HTTPS binding, and change the port from 443 to another number. Search for the Listen 443 directive and update

If the Veeam server is intended to be a dedicated backup appliance and IIS or other web services were installed accidentally or are not needed: Anti-Malware and Endpoint Detection (EDR) Open IIS Manager,

Locate the configuration file ( httpd.conf , nginx.conf , or server.xml ). Search for the Listen 443 directive and update it to a different port. Restart the respective service. 4. Anti-Malware and Endpoint Detection (EDR)

Open IIS Manager, select the site, click Bindings in the right pane, edit the HTTPS binding, and change port 443 to an unused port (e.g., 8443).

If the conflict is with another HTTP.sys reservation, remove the other reservation: