One of the essential functions of the MyQ Desktop Client application is to identify the MyQ user on the computer where it is installed. Thanks to this identification, MDC can mediate communication between the user and the MyQ server; it can inform the user about the state of their account, it enables the user to manage their print jobs, and it also enables the server to determine the job sender.

Once a job is sent to a queue, the status changes to Paused and the user is set to *unauthenticated until they authenticate themselves in MDC. Once they do, the job's status changes to Ready and the user changes to the now authenticated job owner. If the authentication in MDC fails or if the user is not present in the MyQ server, the user is no longer created (needs to be created in MyQ) and the job is rejected.

Depending on how MDC was set up, the user is either identified as the currently opened OS account or they can identify themselves. The self-identification methods are described in:

The login options are selected within the MyQ Desktop Client setup. If you do not want the users to identify themselves, select the Mac single sign-on authentication method.