Creating a group inbox in Outlook

A group inbox in Outlook is a shared mailbox that multiple people can access and manage together. You create one by setting up a Microsoft 365 group, which automatically generates a shared inbox that all group members can send to, read from, and organize. The group inbox appears in Outlook as a folder under "Groups" in the left sidebar, and everyone with access sees the same messages and folders.

The process differs slightly depending on whether you are using Outlook on the web, Outlook desktop, or the Outlook mobile app. Desktop and web versions let you create the group directly; mobile apps can only join existing groups. Most teams use this feature to manage shared projects, customer inquiries, or department-wide communication without forwarding messages between individuals.

Key Takeaways

  • A group inbox is created through a Microsoft 365 group, which you can set up in Outlook on the web or through the Microsoft 365 admin center.
  • All group members see the same messages and can reply, forward, or delete emails from the shared inbox without affecting what others see.
  • You can add or remove members at any time, and new members see the full message history once they join.
  • Group inboxes work best for teams of 2 to 20 people; larger teams may want to use distribution lists or shared mailboxes instead.

Creating a group inbox in Outlook on the web

Open Outlook on the web and look for the "Create group" button in the left sidebar, usually near the bottom of your folder list. Click it, then enter a name for the group (for example, "Marketing Team" or "Project Alpha"). Add a description so members understand the group's purpose, then choose whether the group should be public (anyone in your organization can find and join it) or private (only people you invite can join).

After you create the group, Outlook automatically generates the shared inbox and adds you as the owner. You can then invite team members by typing their names or email addresses in the "Add members" field. Each person you add receives an invitation and can start using the group inbox once they accept it. The group inbox will appear in their Outlook sidebar under "Groups" once they join.

Creating a group inbox in Outlook desktop

In Outlook desktop (Windows or Mac), go to the "Home" tab and click "New Group" in the ribbon. This opens a window where you enter the group name and description. Choose whether the group is public or private, then click "Create." Outlook will set up the group and the shared inbox automatically.

To add members, click the group name in your sidebar, then click "View group details" or the settings icon. Select "Members" and click "Add members." Type the names or email addresses of the people you want to invite. They will receive an invitation and can join from their own Outlook. If you are using an older version of Outlook desktop, you may need to create the group through Outlook on the web instead.

Adding and managing group members

You can add members to a group inbox at any time by opening the group, clicking the settings or details icon, and selecting "Members" or "Manage members." Type the email address or name of the person you want to add and click the add button. They will receive an invitation; once they accept, they have full access to the shared inbox and can see all previous messages.

To remove a member, open the group settings, find their name in the members list, and click the remove or delete icon next to it. Removing someone immediately revokes their access to the group inbox, though they can still see messages they received before being removed. Only group owners can add or remove members, so make sure at least one other person is an owner in case you leave the organization.

How permissions work in a group inbox

By default, all members of a group inbox have the same permissions: they can read, send, reply to, and delete messages. When someone deletes a message, it is removed from the shared inbox for everyone, not just that person. This is different from a personal inbox, where deletion only affects your own view.

Group owners have additional permissions to change the group name, description, privacy settings, and member list. If you need different permission levels — for example, some people should only read messages but not send them — you may need to use a shared mailbox instead of a group inbox. Shared mailboxes offer more granular permission controls but require more setup through the Microsoft 365 admin center.

Using the group inbox after creation

Once the group inbox is set up, members can send messages to it by typing the group name in the "To" field, just like sending to a person. All members will see the message in the shared inbox. You can also create folders within the group inbox to organize messages by project, client, or topic. Click the group name, then right-click in the folder area and select "New Folder."

The group inbox also has a calendar and file storage that all members can access. To use these features, click the group name and look for the "Calendar" or "Files" tabs at the top. This makes group inboxes useful for coordinating schedules and sharing documents without switching between apps. Messages stay in the group inbox indefinitely unless someone deletes them, so you can search and reference old conversations months later.

When to use a group inbox versus other options

A group inbox works well for small to medium teams (roughly 2 to 20 people) who need to manage shared communication. If your team is larger or needs more complex permission controls, a shared mailbox may be better. Shared mailboxes are managed through the Microsoft 365 admin center and allow you to set different permission levels for different people.

If you only need to send messages to a group without a shared inbox, use a distribution list instead. Distribution lists are simpler to set up and work for announcements or one-way communication. If you need a space for team chat, file sharing, and task management alongside email, consider using Microsoft Teams, which includes a shared inbox feature as part of a broader collaboration platform.

Frequently Asked Questions

Can I create a group inbox on my phone?

No, you cannot create a new group inbox from the Outlook mobile app. You can only join existing groups that someone else has created. To create a group inbox, use Outlook on the web or Outlook desktop, then access it from your phone once it is set up.

What happens to the group inbox if the owner leaves?

The group inbox continues to exist and function normally. However, if you are the only owner, you should add another owner before you leave so someone can manage the group. To add an owner, open the group settings, find the member you want to promote, and change their role from "Member" to "Owner."

Can I send a message to a group inbox from outside my organization?

No, external people cannot send messages directly to a group inbox. Only members of your Microsoft 365 organization can access it. If you need external people to send messages to a shared inbox, you would need to use a shared mailbox instead, which can be configured to receive external email.

How many people can be in a group inbox?

Microsoft 365 groups can have thousands of members, but group inboxes work best with smaller teams. If your group grows beyond 20 or 30 people, consider using a shared mailbox or Teams channel instead, as these handle larger groups more efficiently and offer better permission controls.

Can I convert a personal folder into a group inbox?

No, you cannot convert an existing personal folder into a group inbox. You must create a new group inbox from scratch. However, you can move messages from your personal inbox to the group inbox by dragging and dropping them or using copy and paste.