Outlook sharedmailbox AutoMapping / universal security group

Hi

We're trying to give access to a shared mailbox through a universal e-mailed security group.

We have also tried adding the DN of the shared mailbox to the users 'msExchDelegateListLink' attribute that is used for AutoMapping in Autodiscovery.

We have done log off/logon, waited for the next Autodiscovery refresh intervals(60min), restarted Outlook..

however, the automapping does not occour when giving access through the group. It only work if we give the users direct access

Is it suppose to work at all?

Environment: Exch 2013/16/19, OL 2013-2016

/Peter