Before you can fix the conflict, you must pinpoint exactly which process is monopolizing Port 443.
TCP 0.0.0.0:443 0.0.0.0:0 LISTENING 1234
: Internal services within an organization might be misconfigured to use port 443, causing unexpected conflicts with Veeam Backup Replication.
If the conflicting process is PID 4 (System), this typically indicates that Windows components like RRAS or ADFS are using the HTTP.sys driver. Resolve this by:
After resolving the port conflict:
Which specific did the netstat command reveal?
(Event Viewer → Applications and Services Logs → Veeam Backup).
. This will tell you the PID (Process ID) of the application occupying the port Workaround
If the Windows Server hosting Veeam also runs IIS, the Default Web Site often binds to port 443.
What showed up in your port search?
