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

Before killing or uninstalling anything, ask: Can the other application be reconfigured to use a different port?

Assess understanding of cause, impact, diagnosis, and remediation when Veeam Backup & Replication cannot use TCP port 443 because another application is bound to it.

Some security solutions (e.g., McAfee Web Gateway, Symantec Endpoint Protection’s web component) or legacy backup agents run a local HTTPS listener for management. Before killing or uninstalling anything, ask: Can the

If Veeam services were previously uninstalled incompletely and left port bindings.

netsh http show servicestate

Look for http.sys URL reservations on https://*:443/ or https://+:443/. netsh http show servicestate

If after following all steps the port remains occupied by an unidentified or protected service, you may need to:

One of the most common installation and runtime errors encountered with Veeam Backup & Replication is the notification: "Required port 443 for Veeam Backup & Replication is occupied by another application." Look for http

Port 443 is the standard TCP port used for HTTPS (secure web traffic). Veeam requires this port for various components—most notably the Veeam Backup Enterprise Manager and the Veeam Backup Service on the backup repository—to enable secure communication between the console, the server, and managed agents.

Because Port 443 is the default port for secure web traffic worldwide, it is frequently claimed by other applications (like IIS, WSUS, or third-party web servers), leading to a binding failure during Veeam installation or service startup.