Required Port 443 For Veeam Backup & Replication Is Occupied By Another Application ((exclusive)) ✅

Some enterprise security suites host local web consoles on port 443. Step 2: Resolve the Port Conflict

Open IIS Manager, expand your site, click Bindings in the right-hand Actions panel, select the HTTPS binding, edit it, and change port 443 to something else (e.g., 8443 ).

Before you can proceed, you need to know which service is "squatting" on port 443.

Locate the field for or HTTPS Port (defaulted to 443). Some enterprise security suites host local web consoles

Troubleshooting: Required Port 443 for Veeam Backup & Replication is Occupied by Another Application

Remember: Port 443 is a precious resource on any Windows server. Treat it as such, dedicate Veeam to its own machine wherever possible, and always perform a port audit before installation or upgrade. Your backups—and your peace of mind—depend on it.

A specialized solution exists for users encountering the port 443 conflict during an upgrade to Veeam Backup & Replication version 13 (or later). In this version, the "Veeam Web Service" requires port 443, and it is hardcoded with . Locate the field for or HTTPS Port (defaulted to 443)

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Security agents (e.g., Datadog), VMware Workstation services, or communication tools like Skype. How to Find the Blocker

Connects components within the backup infrastructure. Your backups—and your peace of mind—depend on it

Open the , search for cmd , right-click it, and select Run as administrator .

Edit the httpd.conf or ssl.conf configuration file, change the line Listen 443 to Listen 8443 , and restart the service. Step 3: Reconfigure Veeam to Use a Different Port