Required Port 443 For Veeam Backup & Replication Is Occupied By Another Application Upd Here

Run netstat -aon | findstr :443 one more time. Now you should see the Veeam services (like VeeamBackupSvc ) happily listening on port 443.

The magic number here is the (Process ID)—in this case, 4588 .

What is stealing port 443? In my experience, 99% of the time it is one of three things:

: Other hosted web services or the Veeam Service Provider Console (VSPC) Web UI. Recommended Solutions Run netstat -aon | findstr :443 one more time

Veeam technically allows you to change its web service port during installation. Changing Veeam’s default port leads to endless headaches with proxies, mount servers, and future updates. Always free up port 443 for Veeam, not the other way around.

If the offending app is something you don’t need (like a leftover WebEx service or a test website):

Now, find which application owns that PID: What is stealing port 443

Locate the line where the local address ends in :443 and is in the LISTENING state. Note the number in the far-right column; this is the .

Get-Process -Id 4588

If the result says System or Http.sys , you likely have an HTTP kernel-mode conflict (often IIS or another web server). If it says vmware-hostd —wait, that’s a different problem (your Veeam might be trying to run on an ESXi host, which is wrong). Changing Veeam’s default port leads to endless headaches

Routing and Remote Access services often bind to 443 for VPN connections.

Sometimes netstat shows PID 4 (System) using port 443. This is usually kernel driver. The most common fix here is: