I can do this easily in Dynatrace NAM, but seems like no so straight-forward to this in Dynatrace SaaS/Managed (if there is indeed a way to do this)
Solved! Go to Solution.
In SaaS there is option to export users in Account Settings, in manage there is no such option.
In Manage I do this page by page using copy paste into Excel.
Sebastian is right.
In SaaS, go to account settings > User Management > Export user list.
This will download you an Excel spreadsheet with all users and their access rights.
For Managed, you can use the Cluster Management API to export a list of all the users in JSON