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

The error "Required port 443 for Veeam Backup & Replication is occupied by another application" is a classic collision between modern web-based services and Veeam's deep reliance on HTTPS for its core services. While intimidating at first glance, it is almost always resolvable by methodically identifying the offending process—most often IIS—and either moving it to a different port or eliminating it entirely.

Since port 443 is often required and hardcoded for the Veeam Web service/API Gateway in v13, you generally have two options: reconfigure the other application or temporarily stop it during the upgrade. Option A: Reconfigure the Conflicting Application The error "Required port 443 for Veeam Backup

Run the following command to see the process name directly: Option A: Reconfigure the Conflicting Application Run the

Applications with their own web-based management consoles frequently occupy this port. Resolution Strategies Veeam B&R 13 Change Web Service Port 443 The error "Required port 443 for Veeam Backup