Organizers can manage their rooms through this link or in the GoToMeeting applications. There you first enter your primary email address as stated in the Self Service Portal. If you have been activated for use via your area, you will be forwarded to the usual login dialog (Shibboleth, IDP of TU Dresden) by clicking the button "Next". Only there you can use your ZIH account to login.
Note: If you are not redirected to the TU Dresden login dialog, please use the button "Login with Company ID".