In order to use Windows 8 Email, you must be logged into a Microsoft account. This is usually set up during the installation and configuration of Windows 8.
This article assumes you have already created a Microsoft account for your Windows 8 software. If you have not done so already, access the settings within Windows 8 to create and/or log in to your Microsoft account.
If this is the first time setting up mail, click View all in Settings as shown in the following images.
If you previously set up an account, when you launch Mail you will land into the mailbox view. Move your mouse to the far right of the screen or swipe left to bring up the right menu. Click or tap Settings > Accounts > Add an account.
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References: https://knowledge.web.com/subjects/article/KA-01017

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