Required Port 443 For Veeam Backup & Replication Is Occupied: By Another Application New!

Culprit A: IIS (Internet Information Services) or World Wide Web Publishing Service

: Look for the number in the far-right column for the entry with status Match the PID Task Manager , go to the tab, and find the application matching that PID. Experts Exchange 2. Common Culprits and Fixes

Communicates with VMware vSphere, Microsoft Azure, AWS, and secure cloud repositories. Culprit A: IIS (Internet Information Services) or World

Before you can resolve the conflict, you must find out exactly which process is currently holding port 443 hostage. Method A: Using Windows Command Prompt (Fastest)

Open the security suite's administrative console and change its local web management port settings. Before you can resolve the conflict, you must

Connections to Veeam Cloud Connect and public cloud object storage (AWS, Azure, Google Cloud).

If you must keep the conflicting software running on the same server, you must reconfigure it to use a different port (such as 4443 or 8443). If you must keep the conflicting software running

If you shift Veeam from port 443 to an alternative port, remember to update your Windows Firewall and physical network hardware rules to allow inbound and outbound traffic through the newly assigned port. If you'd like to explore this further, let me know:

When upgrading to Veeam Backup & Replication (VBR) v13 , many users encounter a critical installation block:

This guide provides a comprehensive, step-by-step walkthrough to identify the conflicting application, free up the port, or reconfigure Veeam to use an alternative port. Why Veeam Requires Port 443

netstat -ano shows PID 5678 listening on 443 → tasklist /fi "PID eq 5678" returns w3wp.exe (IIS).