is there a possibilty for the administrator to see all active delegations or to add a delegation for a specific user?
only possible via SQL?
SELECT DelegationID FROM NW2013DB.dbo.Delegation
SELECT DelegationID FROM NW2013DB.dbo.DelegationHistory
for getting the information I haven't found any other way than using SQL yet.
For setting a delegation you can also use the AddLongTermDelegationRule method that the nintex web service offers.
Agreed, the web service methods for delegation do not have a show all
And the only NWAdmin operation is DelegateAllTasks and the SharePoint task doesn't really track it separately except if there was a version.
Retrieving data ...