How to Access a Shared Mailbox in Outlook Web App

Method 1: Open Another Mailbox (Recommended)

1. Sign into OWA at outlook.office.com with your regular account
2. Click your profile picture or initials in the top right corner
3. Select "Open another mailbox" from the dropdown menu
4. Type the shared mailbox email address (e.g., m.com)
5. Click "Open"

The shared mailbox will open in a new browser tab, and you'll see:

• Shared mailbox name in the top left
• All folders (Inbox, Sent Items, etc.) for the shared mailbox
• Ability to send emails from the shared address

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**Wait at least 24 hours before attempting to add as additional account. Microsoft takes a while for this to become functioning and trying to add the account before it’s ready may delay or break this option entirely**

Add as Additional Account

1. In your main OWA inbox, click the Settings gear icon
2. Select "Mail" > "Accounts"
3. Click "Connected accounts"
4. Select "Other email accounts"
5. Enter the shared mailbox email address
6. Follow the prompts to add it