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

Before proceeding with your upgrade, verify the full list of required connections in the Veeam Ports List Finder to ensure all other necessary traffic (like ports 2500–3300 for data transfer) is clear. Veeam B&R 13 Change Web Service Port 443

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

The phrase “occupied by another application link” in the error message is simply a sign that the Windows operating system is reporting that a program has already created a network listener on TCP port 443. This conflict is rarely a single type of application. The usual suspects in a Windows environment are: Before proceeding with your upgrade, verify the full

Go to Edit > Preferences > Shared VMs and change the port or disable sharing. Option B: Change Veeam’s Default Port

: Open IIS Manager , check your bindings, and change the HTTPS port of the conflicting website to an alternative port (like 8443 ). Alternatively, stop the specific website if it is not needed. 2. VMware Workstation / vCenter Server The usual suspects in a Windows environment are:

When you encounter the error, you first need to identify precisely which application has taken ownership of port 443. On your VBR server, open and run the following command:

Once you know what process is holding the port, use one of the following methods to resolve it. Method A: Stop and Disable IIS check your bindings

Resolving the port conflict requires a systematic approach. Here's how to identify and address the issue:

: Web servers hosted on the same machine often default to 443 for HTTPS.

netstat -ano | findstr :443