Not sure how it can define it is email from exchange but the issue start to appear after 10.15.4 MacOS update. The local Mailbox (Folder) used to keep the emails which from NetSol and also Office365. Few months ago we helped to migrate to Office 365. Our client had a local Mailbox (Folder) created in MacOS Mail very long time ago, she was using NetSol email system with POP connection before. And the same reason that affects the other old emails on the local folders because there's exchange emails on the same folder." On Apple side they said MS updated something on Office 365, what they said is "a security settings in o365 that blocks it's content to be shown in the mac mail server. There had MacOS Mail issue with Office 365 Exchange from 10.15.4, sadly in original issue is fixed in 10.15.5, but the mentioned new issue is happened. Thanks Support Team , I hope the team can provide more details and advise about how we can fix the issue asap.
#App for mac auto entroll macbook pro 15 update
Microsoft and Apple are working on a resolution and we’ll update this post when new information is available. Working with Apple, we discovered that upgrading to macOS 10.15.4 exposed a bug in auth for several apps including mail and calendar (despite existing enrollment or compliance). The macOS device was enrolled in Intune and there was a conditional access policy requiring a compliant device. We were recently alerted to a scenario whereby after an end user updated to macOS 10.15.4, they experienced unexpected access app prompts or blocks to applications such as native mail.
Update: A fix for this issue has been rolled out with the latest release of macOS 10.15.5.