Symptom
In Signavio Process Manager the report Useractivityreport displays users that did not exist in a given month
Resolution
It is expected behavior when the user activity report displays users that did not exist in a given month. The report does not consider whether the user existed; it just says if a user has logged in in a given period. For non-existing users, it should show no activity, as you mentioned.
Regarding the duplication issue. That can happen when a user is removed from the workspace and added again. It occurs because a new ID is generated every time a user is added to the workspace. Although the email address is the same, the user ID changes, making the user appear multiple times in the report.
Keywords
User activity report, report, process manager, signavio, sap signavio , KBA , BPI-SIG-PM-REP , Reports for SAP Signavio Process Manager , Problem