If the server is multi-role and the application currently using Port 443 cannot be changed (e.g., a critical internal web portal), you can configure Veeam to use alternate ports. However, be aware that this may complicate firewall rules and is not supported for Veeam Cloud Connect providers.
Are you seeing this error during a or did it suddenly appear on an existing server ?
Right-click it, select , change the Startup type to Manual or Disabled , and click Stop . Strategy B: Change the Binding Port of the Conflicting App If the server is multi-role and the application
Which of Veeam Backup & Replication are you currently running?
Edit the httpd.conf or ssl.conf file and change Listen 443 to another port. Option 3: Change the Port in Veeam Right-click it, select , change the Startup type
Locate the field for or REST API port (depending on the Veeam version). Change 443 to an available port, such as 4443 or 8443 . Proceed with the installation. For an Existing Installation (Modifying Registry):
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Open services.msc , locate the offending service (like World Wide Web Publishing Service or VMware Host Agent ), right-click it, and select Stop . Change its Startup Type to Manual or Disabled if it is no longer required on this machine. Strategy 2: Reconfigure the Conflicting Application Option 3: Change the Port in Veeam Locate