---
title: "Installation"
manual: "Microsoft Exchange 365 Mailer"
version: "3.2"
permalink: "https://docs.typo3.org/permalink/oliverkroener/ok-exchange365-mailer:installation@3.2"
source: "Installation.rst"
rendered: "2026-10-04T19:57:30+00:00"
---

# Installation {#installation}

## Install with Composer {#installation-composer}

> [!NOTE]
> This is the recommended way to install this extension.

Install the extension via Composer:

```bash
composer req oliverkroener/ok-exchange365-mailer
```

See also [Installing extensions, TYPO3 Getting started](https://docs.typo3.org/m/typo3/tutorial-getting-started/13.4/en-us/Extensions/InstallingExtensions.html#installing-extensions).

## Install in Classic Mode {#installation-classic}

> [!WARNING]
> This is not the recommended way to install this extension, and **might involve manual steps** to add **dependencies**.

Or download the extension from [https://extensions.typo3.org/extension/ok_exchange365_mailer](https://extensions.typo3.org/extension/ok_exchange365_mailer) and install it in
the Extension Manager.