Required Port 443 For Veeam Backup Replication Is Occupied By Another Application Link Jun 2026

Once you've identified the conflicting application, evaluate your options:

: Use netstat -anob to find what service is using 443.

Because Port 443 is a standard networking port, applications like Microsoft IIS, VMware Workstation, Skype, or web servers frequently conflict with Veeam components. This comprehensive guide walks you through diagnosing the conflicting application, freeing up the port, or modifying Veeam configurations to restore your backup infrastructure. Understanding Why Veeam Requires Port 443 Understanding Why Veeam Requires Port 443 Third-party web

Third-party web servers or monitoring tools installed on the backup server might host their admin consoles on HTTPS.

Veeam Backup & Replication (VBR) requires TCP port 443 for core functionalities, including: Microsoft Internet Information Services (IIS) is one of

When configuring Veeam Backup & Replication, a smooth installation or smooth operation of existing jobs is crucial for data protection. However, a common technical roadblock arises when Veeam attempts to use TCP port 443—vital for secure HTTPS communication, specifically for Veeam Backup & Replication (VBR) components, proxies, and repositories—only to find it occupied by another application.

Microsoft Internet Information Services (IIS) is one of the most common culprits. Many organizations host their internal websites on the same server, and IIS binds to port 443 by default. Once you've identified the conflicting application

Any tool with a web interface.

: A frequent cause is the Hyper-V Replica service on the same server. An "easy fix" reported in Veeam R&D Forums involves changing the Hyper-V replication port from 443 to another value (e.g., 444) before proceeding with the Veeam upgrade.

netsh http delete urlacl url=https://+:443/