This usually means that you need to re-enter your Outlook details into Ezekia again. It can happen if you have changed your Outlook password, or if we have added new features to the Microsoft integration.
To resolve this, navigate to your Settings page via the 3 line icon in the top right corner, and scroll down a little. Click icon (1) to re-enter your details. Should this fail, or if you do not see the icon, you can delete the existing authentication with icon (2) and re-authenticate with ‘Integrate new email’.
