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

Update individual VM replication settings to match the new port. Temporary Workaround for Upgrades

Do not guess. Use built-in Windows tools to get the definitive Process ID (PID).

If w3wp.exe or inetinfo.exe is the offender, IIS is running. You have three choices: Update individual VM replication settings to match the

If the process refuses to close, force-close it by running: taskkill /PID /F Use code with caution. Step 4: Verify Port Availability and Restart Veeam

Since Veeam's use of 443 is hardcoded, you must typically reconfigure the other application to free up the port: : If w3wp

Port 443 is the standard port for HTTPS (Hypertext Transfer Protocol Secure) traffic. When Veeam Backup & Replication requires this port for its web services or API Gateway, it checks for availability during installation or service startup. If another application is already bound to this port, Veeam cannot claim it, triggering the port conflict error.

You need to discover exactly which process ID (PID) and executable is occupying port 443. Open or Command Prompt as an Administrator. When Veeam Backup & Replication requires this port

: Default web servers often bind to 443 for HTTPS.

What did the netstat command reveal to be using the port?

For a permanent solution:

Before diving into solutions, it is critical to understand why Veeam insists on Port 443. Veeam Backup & Replication uses Port 443 for several key functions: