Microsoft Teams Blog articles Follow MAM policies are not directly applicable to Outlook for on-premises Exchange users. Microsoft Intune App Protection (MAM) policies are not directly supported for Outlook when the mailbox is hosted on an on-premises Exchange environment. https://techcommunity.microsoft.com/t5/exchange/mam-policies-are-not-directly-applicable-to-outlook-for-on/m-p/4531510#M17275 techcommunity.microsoft.com
