Prior to entering the solutions discussion, here is a brief list of causes we can identify that can be the reason behind the Outlook permission issue: Before moving on with the solutions to enable permissions in Outlook, check if the Outlook can directly be opened from the Applications folder (not from a shortcut or a document/calendar event). Moreover, if you are a part of the beta channel, then check if opting out of the same (the Office apps will reinstall) solves the issue for you.
Update the Outlook/ Office Installation of Your Mac to the Latest Build
An outdated Office installation could cause incompatibility between Outlook or the macOS, resulting in the error Microsoft Outlook permission error. In this case, updating your Mac’s Office installation to the latest build may solve the problem.
Update the OS of Your Mac to the Latest Build
If the OS of your Mac is not updated to the latest build, it may fail to catch up with rapidly updated Office apps and become incompatible with itr. In this case, updating the OS of your Mac to the latest build may solve the problem.
Add Back the User Profile in Applications
If an Office or macOS update (due to a glitch in the update) has removed the user profile from the Outlook Profile Manager, it may cause the permission issue under discussion. In this case, adding back the user profile to the Outlook application (with the read/write permissions) may solve the problem.
Reinstall the Microsoft Outlook on Your Mac
The Outlook application might become corrupt due to many factors like a sudden power failure and this corrupt Outlook installation may cause the permission issue under discussion. In such a case, reinstalling Microsoft Outlook may solve the problem. Before moving on, we strongly recommend that you back up your Mac (with Time Machine) and Outlook data (just in case…).
Reinstall from the Microsoft Website
Reinstall from the Mac’s App Store
Apple has enhanced the security of its OS by requiring the non-App Store apps (including the Microsoft Office app) to be code signed and as these apps are not, then you may have to install the Microsoft Store apps from the Apple Store. Although, some users have reported that they successfully solved the issue by code signing the Microsoft Office apps (by installing Homebrew) or by disabling Mac’s Gatekeeper but we strongly do not recommend that path. If that did not work, then you may install a previous version of Outlook (till the issue is resolved) or reinstall the macOS to solve Outlook’s permission issue.
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