# Office 365: Installing Outlook addin

An Outlook add-in consists of two components: the XML add-in manifest and a web page supported by the JavaScript library for Office Add-ins (office.js). The manifest describes how the add-in integrates across Outlook clients. See [Microsoft documentation](https://docs.microsoft.com/en-us/office/dev/add-ins/outlook/manifests) for details.\
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Aurinko auto-generates an addin manifest for youe Aurinko addin apps, see how.

In Outlook (desktop) click the **Get add-ins** ribbon button:

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A popup will appear. Select **My add-ins**, scroll down to the **Custom Addins** section, and select the **Add from File...** option. Upload the manifest file you downloaded from your Aurinko app, click **Install**.

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The addin should be installed!

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Close the popup and check the main ribbon menu in Outlook.

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Click **Open Aurinko** to open your Aurinko addin!