How to open another mailbox in office 365. These instructions assume you've already exported your Outlook email, contacts, and calendar from another instance of Outlook, and now you want to import them to Outlook. Under Members, add users to grant Full Access automatically. Jun 6, 2025 · In this blog post, we will guide you through the process of accessing another user’s mailbox in Microsoft 365, emphasizing why this capability is crucial for small businesses in Australia. Understanding this behavior upfront prevents common issues like missing responses, broken updates, or unexpected organizer changes. Toggle the Enable forwarding switch, enter the forwarding email address, and select Save. Sign into your account on Outlook Web App (OWA). The “Open another mailbox” prompt will now appear. Use the following steps to open the mailboxes for which you have been granted access. This saves time and reduces the risk of missing important emails. Open a shared mailbox 1. But, it’s easy! Nov 1, 2022 · This is a detailed guide on how to open another Mailbox in Outlook. Aug 6, 2025 · Here's a clear step-by-step guide to adding a shared mailbox in Outlook 365 (old, new and web app), sending emails from it, and setting it as default From address. 2 days ago · Adding a new mailbox in Outlook means connecting another email account or inbox so you can send, receive, and manage messages from the same app. Classic Outlook is included with Microsoft 365 subscriptions that include desktop apps such as Microsoft 365 Personal or Family or Microsoft Using the Archive button to move messages to the Archive folder doesn't reduce your mailbox size. At the top window of the new Outlook, select Settings . To open another user’s mailbox you will need full mailbox permissions to the mailbox. Note: Importing a mailbox or calendar using a . Can I still use Outlook apps? How does mailbox storage and Microsoft storage work for Outlook? Why do I see ads in my Outlook inbox? What do I get for Outlook with a Microsoft 365 subscription? If I have a personal Office (one-time) license, will I be able to access desktop apps and have an ad-free Outlook experience? Set up another email account in Outlook for iOS Open the Outlook for iOS app on your iOS device. To import from a . At the top of the app, tap the Outlook button next to Inbox, and then select Settings . In the New Outlook experience, permission management looks simpler on the surface, but it is still tightly linked to Exchange Online and Entra ID behind the scenes. Refer to the article grant full mailbox permissions in office 365 for complete instructions. Shared mailboxes let a group of users view and send email, and share a calender, and open a contact list from a common mailbox. Depending on the email client you choose, the detailed instructions for accessing the shared mailbox are listed below: If you have access to multiple mailboxes, and you’re used to using Outlook where you can see them all together, it’s not immediately obvious how to see them all when using Outlook on the web. Jun 25, 2025 · You can access user's mailboxes by using Outlook or Outlook Web App. Instead of juggling multiple browser tabs or profiles, Outlook brings everything into one unified workspace. Select Mail > Forwarding. pst to a mailbox, you need to use the desktop version of Outlook (also known as classic Outlook) following the steps below. 4. Learn how to open a shared mailbox in Outlook. 6 days ago · In the Microsoft 365 Admin Center, open Teams & groups, then Shared mailboxes, and select the mailbox. Understanding how permissions actually work prevents access Feb 23, 2026 · Run the Remove-MailboxPermission, Set-Mailbox, or Remove-RecipientPermission cmdlets in Exchange Online PowerShell or use the Delegation tab of a mailbox in the EAC to remove mailbox permissions in Microsoft 365. Pst files are created when you export or back up email, contacts, and calendar to an Outlook . Outlook known issues in the January 2020 updates [FIXED] Outlook prompts for credentials for on premise users with Office 365 client [FIXED] Unable to send emails from QuickBooks, Office applications, or all Windows applications that allow to send files as attach [WORKAROUND] Unable to save changes to a draft email in Draft folder for IMAP accounts Feb 24, 2026 · Sending a meeting invite from a shared mailbox in Microsoft 365 behaves differently than sending one from a user mailbox, and those differences affect ownership, responses, and ongoing management. Feb 2, 2026 · Learn how you can add more than one email address, called an email alias to users in your Microsoft 365 organization. May 14, 2020 · Login to Office 365 Outlook using your own email address and password. Type the email address of the mailbox you want to view in here and click “Open” as shown below: Depending on your browser, the mailbox will now open in a new tab/window. . 3. If you have to reduce your mailbox size, you can use Online Archive in Microsoft 365 for enterprises. . Select Account, then Add Account to add one of your existing email accounts, or Create New Account if you want to create a new Microsoft account. Feb 22, 2026 · Shared mailboxes are a core collaboration feature in Microsoft 365, letting multiple users read and send email from a single address without needing a separate license. Outlook makes a copy of your email to the . pst file. In this guide you’ll learn: Let’s get started. pst file is currently not supported in new Outlook at this time. 2. Click on the profile picture in the top right-hand corner and select Open another mailbox. Note: If you want a copy of the original message to remain in your mailbox, select Keep a copy of forwarded messages. When the Open another mailbox window appears enter the name or email address of the shared mailbox and click on Search contacts and directory.
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