Required Port 443 For Veeam Backup & Replication Is Occupied By Another Application ((install)) 🌟

[Info] HTTPS listener started on 172.18.0.10:443. Ready to serve.

Opened IIS Manager → Default Web Site → Bindings → removed HTTPS:443 binding → Restarted IIS ( iisreset ). Result: Veeam Backup Service started normally.

Before killing or uninstalling anything, ask: Can the other application be reconfigured to use a different port?

She realized the truth with a sinking feeling: Veeam, by default, binds to all interfaces. It saw the AcmeCorp agent still technically occupying the port on the secondary IP. Windows Sockets don’t care about your IP segmentation logic—if any process listens on 443 on any IP, no other process can bind to 0.0.0.0. A cold war over a single integer.

: Some users have reported that stopping the conflicting service just long enough to complete the Veeam upgrade works, but VBR services will likely crash once the other app is restarted. Veeam Service Provider Console