Web: Office 365 (O365) Email Settings

Basic Information

The Office 365 (O365) Email Settings system relies on the organization having and utilizing two things:

1. An Azure Active Directory (AAD) system hosted on Microsoft Office 365 system; and,
2. An Exchange Email system utilizing and connected to that AAD system.

Setup

In Azure Active Directory admin center, click on "App registrations".

Choose "New registration".

In the "Register an application" page, enter a name, such as "Prime 16 Web User Manual Demonstration" (used in this example). For "Supported account types", choose "Accounts in this organization directory only". Click the "Register" button.

In the main page for the app registration, next to Client credentials, click the link.

In the Certificates & secrets page, click on "New client secret".

Enter a description for the secret, such as "Prime 16 Demo Client Secret", and choose an expiration. Make a note of this expiration and come back to create a new one shortly before that period to continue using this system. Click the "Add" button.

In the resulting page, make sure to copy the "Value" and "Secret ID" from the page. The Value is only available once.

Click on "Overview" to return to the main page. Next to "Redirect URIs", click the link.

Click "Add URI" and add two new Redirect URIs. The format of these will be, for example:

"https://test.kempscaseworks.com/demo_prime16/o365/o365login.aspx" and "https://demo.kempscaseworks.com/prime16/o365/o365login.aspx". Only using your organization's test and production URI values.

Save these new entries and return to the Overview.

Click on API permissions and "Add a permission". Add the following:

Follow the "Register service principals in Exchange" of the web page found here https://learn.microsoft.com/en-us/exchange/client-developer/legacy-protocols/how-to-authenticate-an-imap-pop-smtp-application-by-using-oauth

SPECIAL NOTE: Do not give access to one mailbox. Only register an Azure AD application service principal in Exchange.