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

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To resolve the conflict, you must find the process identifier (PID) of the application holding the port. Step 1: Execute Netstat via PowerShell

If you encounter the error "Required port 443... is occupied by another application," you must first identify the process holding the port. or PowerShell. Run the following command : netstat -ano | findstr :443 Locate the PID (Process ID) in the rightmost column.

This error typically occurs during the installation or upgrade to Veeam Backup & Replication v13 (or newer), as port 443 is now hardcoded and required for the Veeam Web Service/API Gateway Authenticates and commands VMware environments securely

Reconfigure the web server configuration file ( .conf ) to listen on a custom port. tomcat.exe Third-party management tools or print servers Modify Tomcat's server.xml connector port string. Step 2: Resolving the Conflict

The error can manifest in different scenarios:

Right-click the button and select Terminal (Admin) or PowerShell (Admin) . is occupied by another application," you must first

Once the port is free, restart your Veeam services via services.msc or restart the Veeam installation wizard. Best Practices for Veeam Deployments

Legacy communication apps sometimes occupy ports 80 and 443 as alternatives for incoming connections.

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Verify that the PID matches the Veeam service process ID found in Task Manager. Preventative Best Practices

If the PID belongs to w3wp.exe or the system process handles it via IIS: Open ( services.msc ). Locate World Wide Web Publishing Service . Right-click it and select Properties . Change the Startup type to Disabled and click Stop . Method B: Change the Conflicting Application's Port