How to Open Another Mailbox in Office 365
Modified on: Tue, May 21 2024 2:01 PMAdd another person’s mailbox to your folder list in Outlook Web App
After you complete this procedure, the person’s mailbox for which you have been provided access to will display in your Outlook folder list every time you open Outlook.
Log in to your mailbox using Outlook via https://outlook.office365.com.
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Right-click the word Folders on the left-hand side and select Add shared folder or mailbox.
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In the Add shared folder dialog box, type the name of the mailbox that you have been provided access, and click Add.
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The mailbox appears in your Outlook folder list.
If you have only been provided access to specific folders in the other user’s mailbox, you will only see the folders for which you have been granted access.
If you decide that you no longer want to see the other person’s mailbox every time you open Outlook, right-click the folder, and click Remove shared folder.
Open another person’s mailbox in a separate browser window in Outlook Web App
If you do not want to add the other person’s mailbox to your folder list in Outlook Web App, you can open the other person’s mailbox in a separate browser window.
Log in to your mailbox using Outlook via https://outlook.office365.com.
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In the Navigation bar on the top of the Outlook Web App screen, click on your name. A drop-down list will appear. Click Open another mailbox.
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Type the email address of the other mailbox that you want to open, and click Open.
The other person’s mailbox opens in a separate Outlook Web App browser window.
If you have only been provided access to specific folders in the other user’s mailbox, you will only see the folders for which you have been granted access.