Attempting to install an add-in with the “Add from the Office Store” feature with an Exchange 2016 mailbox fails with: “Due to the level of permissions required, your administrator has not allowed you to install this app.”
January 18, 2021
Problem You have an Exchange Server 2016 CU18 (Version 15.1 Build 2106.2) environment and noticed that when users attempt to install an add-in with the Add from the Office Store feature, it fails with the error: Due to the level of permissions required, your administrator
