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

The error "Required port 443 for Veeam Backup & Replication is occupied by another application" typically occurs during an upgrade to Veeam Backup & Replication (VBR) v13, as this version introduces a hardcoded requirement for port 443 for its REST API and Web UI. Review of Issue & Solutions

The result made his blood run cold: vmware-hostd.exe. The error "Required port 443 for Veeam Backup

Currently, there is no supported method to change the port for the Veeam Web Service in VBR v13. You must free the port by reconfiguring the conflicting application: For Hyper-V Conflicts: Navigate to Hyper-V Settings > Replication Configuration. Start the Veeam setup wizard

Changing Veeam’s Port 443 During Installation

1. Start the Veeam setup wizard.
2. On the Service Account Configuration or Ports Configuration screen (varies by version), locate the field for Veeam Backup Service port (HTTPS).
3. Change 443 to an alternative like 8443 or 9443.
4. Complete the installation.

netsh http delete urlacl url=https://+:443/

1. If possible, change the occupying application's port to a different one. For example, if a web server is using port 443, you can change its configuration to use a different port, such as 444.
2. Restart the occupying application for the changes to take effect.

1. Executive Summary

Veeam Backup & Replication (VBR) requires TCP port 443 for core functionalities, including: netsh http delete urlacl url=https://+:443/

Major Issues After Upgrading to Veeam V13: Port 443 Conflict

Step 4 — Restart services and verify

1. Restart affected services or the server if needed.