Access shared calendar and other users calendar

Hi

We have just finished migrating to Exchange 2013, but are having some issues regarding access to other resources like calendar and inbox.

let me give you an example.

1 user Outlook 2013 in cached mode. Cannot access another users calendar og indbox though the permissions are set correctly.

Tries from OWA with same user and here she can access the calendar.

Tries to use Outlook in non cached mode and here it Works.

Has anybody a solution for this.

Best regards

Dennis

Best regards

Dennis