Problem Description

It's currently not possible to add / update groups on Boards in Jira via REST API. There is no endpoint developed to change this feature yet.

• Jira Agile Server REST API reference - This is the REST API reference for all Agile endpoints in Jira DC
• Jira Server platform REST API reference - This is the REST API reference for all others endpoint in Jira DC

Solution

Allow for the possibility, ie via API endpoint, to perform board configuration updates. 

Workaround

No workaround available