Required Port 443 For Veeam Backup Replication Is Occupied By Another Application Link May 2026

When upgrading to Veeam Backup & Replication (VBR) v13 is a strictly required, hardcoded dependency for the new Veeam Web Service/API Gateway

Need further assistance? Visit the official Veeam R&D Forums or open a support case with Veeam Customer Support. Include the output of veeamportssniffer.exe (available in the Veeam ISO tools folder) for rapid troubleshooting. When upgrading to Veeam Backup & Replication (VBR)

Let's dive deep into the issue of port 443 being occupied by another application when trying to use it for Veeam Backup replication. Use Process Explorer to inspect which service has

Troubleshooting tips

• Check Veeam logs (C:\ProgramData\Veeam\Backup) for precise error messages.
• If netsh shows HTTPS reservations, inspect:

  netsh http show sslcert
  netsh http show urlacl
  

• Use Process Explorer to inspect which service has the handle if PID maps to svchost.exe — look at service name(s).
• If a service uses HTTP.sys and appears as System or svchost, use:

  sc queryex <serviceName>
  

  to map the service.
• For Docker on Windows, check Hyper-V/NAT port mappings.