# How to Guides

- [Create App Registration](/extensibility-and-integration/products/active-directory/microsoft-graph/how-to-guides/create-app-registration.md)
- [Limit Permissions to a Specific Mailbox](/extensibility-and-integration/products/active-directory/microsoft-graph/how-to-guides/limit-permissions-to-a-specific-mailbox.md): This document describes how to limit the permissions for an App Registration to a specific mailbox or a set of mailboxes.