Right-click and (or Restart ) the Veeam Backup Service .

Veeam Backup & Replication (VBR) v13 is now a mandatory, hardcoded requirement for the Veeam Web Service and API Gateway. If this port is occupied by another application, the VeeamBackupRESTSvc

Get-NetTCPConnection -LocalPort 443 | Select-Object LocalAddress, LocalPort, State, OwningProcess Use code with caution. Locate the PID under the OwningProcess column. Step 2: Map the PID to an Executable Name

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Locate the conflicting service (e.g., if it is IIS). Right-click the service and select Properties . Change the Startup type to Manual or Disabled . Click Stop , then click OK . Method B: Change the Port of the Conflicting Application

The offender. On Windows Server, the default IIS installation automatically creates a "Default Web Site" bound to all unassigned IP addresses on port 80 (HTTP) and, critically, port 443 (HTTPS) . Even if you don't run a public website, this default binding claims port 443.

For any existing VMs replicating to this host, update their individual replica server port properties to match. Culprit C: VMware Workstation or Third-Party Web Servers

Dealing with Port 443 Conflicts in Veeam Backup & Replication

Veeam experts recommend moving the backup server to a dedicated, non-domain-joined environment to avoid conflicts and improve security.

Change the port from 443 to 444 or another free port, or remove the binding. Scenario B: Hyper-V Replication Server

Now restart Veeam Backup Service.

Grading: completeness, actionable items, defensible automation suggestions.