When attempting to use the Dynamics 365 App for Outlook, you see the following message:
“You don’t have required role or privilege to complete this action. Please contact your administrator to get necessary access.”
This message can appear when a user without the System Administrator role tries to open Dynamics 365 App for Outlook and their mailbox is configured with a Dynamics 365 Sandbox environment with Admin mode turned enabled. When Admin Mode is enabled, only users with the System Administrator role can access the environment.