The administration ID is used to identify the administration. This ID can look as follows: 2F1E4FC0-81FD-11DA-9156-00036A0F876A.
Request ID through the web service
The administration ID can be collected through the AdministrationID(sessionID, administrationName) web service method.
Search manually for the ID in the web interface
The administration ID can also be found manually by going to the respective administration in My domain (Settings). Afterwards you right click on its details and select Open link in new tab. The ID can be selected from the URL in the address bar (reference behind ID=). Check the images below for clear instructions.