---
title: "Microsoft 365 Outlook E-Mail Servers"
slug: "microsoft-365-outlook-e-mail-servers"
updated: 2024-12-03T12:05:58Z
published: 2024-12-03T12:05:58Z
canonical: "help.mail-and-deploy.com/microsoft-365-outlook-e-mail-servers"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.mail-and-deploy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Microsoft 365 Outlook E-Mail Servers

### General

This type of [E-Mail Server](/release35/docs/introduction-7) uses Microsoft 365 Outlook for sending e-mails.

### Properties

This type of e-mail server has the following properties:

| Name | Description |
| --- | --- |
| Name | The name of the e-mail server. |
| Tenant ID | The ID of the Azure AD tenant. |
| Client ID | The client ID of the application that has been created in Azure AD (see below). |
| Client Secret | The client secret of the application that has been created in Azure AD (see below). |
| User ID | The ID of the user used to send e-mails. You can find the ID of the user in Azure AD portal when clicking on the user where you will find an *Object ID* that needs to be used here. **Version 3.5.7 and lower.** |
| Sender Address | The sender e-mail address to use when sending e-mails through the e-mail server. **Version 3.5.8 and higher.** |
| Reply-To Address | The e-mail address to which replies by recipients of e-mails send through the e-mail server shall be sent. **Version 3.5.8 and higher.** |
| Maximum Number Of Retries | The maximum number of retries to perform if sending an e-mail fails. |
| Delay Between Retries | The delay between two retries if sending an e-mail fails. |

### Test Settings

You can test the configured e-mail server by clicking the *Send Test E-Mail* button; you will be prompted to enter an e-mail address to send the test e-mail to.

### Azure AD Configuration

In order to use Microsoft 365 Outlook e-mailing function through Mail & Deploy, you need to perform the following configuration steps:

- In Azure AD, go to *App registrations* and register a new application or use an existing one (i.e. if you already have a Mail & Deploy associated application). The application (client) ID needs to be entered in the *Client ID* property of the e-mail server in Mail & Deploy.
- Click *Certificates & secrets* and create a new client secret; you can name it *EMailing* or something similiar and you'll get a client secret you need to enter as the *Client Secret* property in Mail & Deploy.
- Under *API permissions* you need to add the **Microsoft.Graph** *Mail.Send* permission to the application. Note, this should be the 'Application' permission, not the 'Delegated' permission.