WsatConfig Error 15 – Configuration of http.sys failed. A previous HTTPS port reservation already exists for the specified port.

In this post, you’ll learn more about the Error15 – Configuration of http.sys failed. A previous HTTPS port reservation already exists for the specified port. generated by the WS-AtomicTransaction Configuration Utility (wsatConfig.exe) and the potential solution that helps to resolve the issue.

wsatConfig Error Description

Configuration of http.sys failed. A previous HTTPS port reservation already exists for the specified port.

How to fix the Error Configuration of http.sys failed. A previous HTTPS port reservation already exists for the specified port. ?

You can fix this error in wsatConfig by following the below steps

Another application has already taken ownership of the specific port. Change to a different port or uninstall or reconfigure the current application.