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

If is the cause, go to Hyper-V Settings > Replication Configuration and change the port from 443 to another value (e.g., 444).

Open the settings of each replicated virtual machine on the host, locate the subsection, and update the replica server port to match your new configuration. Scenario B: IIS Web Server Conflict

Historically, Veeam relied on arbitrary, customizable high-range ports for basic control communications, leaving standard web ports clear. However, modern iterations of Veeam Backup & Replication rely heavily on the and built-in REST API architectures. If is the cause, go to Hyper-V Settings

: If the host server acts as a Hyper-V Replication target over HTTPS, the system listener binds directly to port 443.

The number 1234 in the last column is the of the offending application. To find out which application is using this PID, run: However, modern iterations of Veeam Backup & Replication

Before you can resolve the conflict, you must find the process ID (PID) and the name of the executable using Port 443. Method A: Using Windows Command Prompt (Fastest) Run Command Prompt as an .

Addressing the issue of port 443 being occupied by another application involves several strategies: To find out which application is using this

Get-NetTCPConnection -LocalPort 443 | Select-Object LocalAddress, LocalPort, OwningProcess, @Name="ProcessName";Expression=(Get-Process -Id $_.OwningProcess).ProcessName Use code with caution. 2. Identify the Common Culprits

Check the netstat -ano | findstr :443 command again to ensure the Veeam PID is now the one listening.

When another process binds to port 443 before Veeam starts, the Veeam Backup Service fails to initialize. This report outlines the causes, detection methods, and step-by-step resolution procedures.

Standard vCenter components frequently listen on this port.