REST API, Operation GET_ALL is not supported

REST API, Operation GET_ALL is not supported

Hi,

Im trying to get information aboaut a specifik user/requester such as mailadress.
I've been working with this API before when creating and editing case's but for some reason the operation name "GET_ALL" do not work.

Following error occurs:

<operation name="GET_ALL"><result><status>Failed</status><message> Operation GET_ALL is not supported.</message></result></operation>


What might I be missing?


Regards 
Pontus 

                New to ADSelfService Plus?