• We have a BUG ticket opened as the JVM argument -Dupm.pac.disable=true  is not working to disable the UPM connectivity as per BUG ticket https://jira.atlassian.com/browse/JSWSERVER-19792
• In the scenario when a Customer uses Proxy, and the server does not have outgoing traffic opened, and accidently enable / checks the Connect to the Atlassian Marketplace option in the Manage Apps > Settings, this page will not be accessible and the Customer will receive a HTTP 504 timeout from the proxy. As the server does not have connectivity to outside world ( outgoing traffic blocked ), the Proxy is not able to complete the request and times out.
• The only currently way in this scenario to resolve this is bypassing the proxy so it can be disabled back from Jira UI. Bypassing the proxy is not alwasy a feasible solution for the Customers, as it may require down-time, if there is no other HTTP connector configured.

This Feature Request suggest to implement a Jira REST API Endpoint to disable UPM connectivity, so the Manage Apps page can be accessed via Proxy afterwards, when this incident in this scenario occurs.