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

If after following all steps the port remains occupied by an unidentified or protected service, you may need to:

WinRM can be configured with an HTTPS listener bound to port 443 for PowerShell remoting.

SSRS, when configured to run in native mode, uses port 443 for encrypted report manager access. This often coexists with Veeam’s own installed SQL Server instance, leading to conflicts. If after following all steps the port remains

netsh http show servicestate

Look for http.sys URL reservations on https://*:443/ or https://+:443/.

If the Veeam server is intended to be a dedicated backup appliance and IIS or other web services were installed accidentally or are not needed: Look for http

Veeam uses Port 443 for secure communication. Changing Veeam's port requires reconfiguring all managed servers and components to trust the new port, which is complex. It is usually easier to move the other application off port 443.

If IIS is the culprit:

If you are not using IIS on this server:

Total: 90 minutes

Veeam operates on a "component-based" architecture. The Veeam Backup Server is the brain, and it communicates with "Components" (Proxies, Repositories, WAN Accelerators) using a proprietary protocol wrapped in SSL/TLS encryption.