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Quick Answer

To add an external guest to a Team, click the three dots next to the Team name, select Add member, and type their full email address. They will receive an email invitation to join your Team.

How to Work with External Guests in Microsoft Teams ​

Applies to: Microsoft Teams (Desktop, Web, Mobile)
Article Type: How-To
Last Updated: 2026-05-18

Summary ​

This article explains how to collaborate with people outside your organization in Microsoft Teams — including inviting external guests to a team, chatting with external contacts, sharing files securely, and understanding what guests can and cannot access. Guest access is managed by IT, but most day-to-day interactions are handled by team owners and members.

Prerequisites ​

  • A Microsoft Teams account with your organization.
  • Guest access must be enabled by your IT administrator (if it is not, the options described below will not be available — contact IT to request it).
  • To invite guests to a team, this requires team owner access. Members can chat externally if external access is enabled.

Instructions ​

1. Invite an External Guest to a Team ​

Team owners can add people from outside the organization as guest members of a specific team.

  1. Open Microsoft Teams and navigate to the team where you want to add a guest.
  2. Click the three-dot menu (⋯) next to the team name and select Add member.
  3. Type the guest's full email address (e.g., [email protected]).
  4. Teams will show the contact with a (Guest) label. Click Add.
  5. Optionally, edit the guest's display name to include their company (e.g., "Jane Doe (Partner Firm)") for clarity.
  6. Click Close. The guest receives an email invitation with a link to join the team.

Tip: The guest does not need a Microsoft 365 license or account — they can sign in with any work, school, or personal Microsoft account, or create a free one during the acceptance process.

2. Understand What Guests Can and Cannot Do ​

CapabilityGuest CanGuest Cannot
View and post in channels they are added to✅
Access files in channels they belong to✅
Participate in channel and group chats✅
Join and present in Teams meetings✅
Be @mentioned in conversations✅
Search within the team✅
Create new channels❌
Access other teams they are not added to❌
View the organization directory or org chart❌
Install or manage apps/tabs❌ (owner must add)
Access SharePoint sites outside the team❌
See other users' calendar or presence (by default)❌

INFO

Guest permissions may vary based on your organization's IT policies. Some organizations restrict file downloads, screen sharing, or meeting creation for guests. If a guest reports missing capabilities, contact IT to check the guest access policy.

3. Chat with External Contacts (Without Adding Them to a Team) ​

If you need a quick conversation with someone outside your organization without giving them team access, you can use external chat (also called "external access" or "federation").

  1. Open Microsoft Teams and click Chat in the left sidebar.
  2. Click New chat (pencil icon at the top).
  3. In the To field, type the external person's full email address.
  4. If external access is enabled, you will see their name with an External tag.
  5. Send your message. The external contact receives it in their own Teams app.

Limitations of external chat (vs. guest access):

  • You can exchange text messages, emojis, and GIFs.
  • You cannot share files directly in the chat (use a OneDrive sharing link instead).
  • You cannot add the person to a group chat with internal members (unless they are added as a guest).
  • You cannot see each other's presence or availability status by default.

4. Share Files with External Guests Securely ​

When a guest is added to a team, they automatically have access to files in the channels they belong to. For additional file sharing:

Share via the Teams Files Tab ​

  1. Upload the file to the channel's Files tab.
  2. The guest can view, download, and (if permissions allow) edit the file directly.
  1. Open OneDrive (web or desktop).
  2. Right-click the file and select Share.
  3. Click Anyone with the link can edit to change the sharing scope:
    • Specific people — Most secure. Enter the guest's email address.
    • Anyone with the link — Less secure but convenient for quick shares.
  4. Set optional controls: Allow editing (on/off), Expiration date, Password.
  5. Click Copy link and paste it into the external Teams chat or email.

DANGER

Always use the most restrictive sharing option that meets your needs. For sensitive documents, use Specific people with an expiration date. Avoid "Anyone with the link" for confidential files. See How to Share Files and Folders via OneDrive for detailed sharing options.

5. Schedule a Meeting with External Guests ​

You can invite external guests to Teams meetings regardless of whether they are a member of your team.

  1. Open Microsoft Teams and go to Calendar.
  2. Click New meeting.
  3. In the Add required attendees field, type the external person's email address.
  4. Fill in the meeting details (title, date, time, agenda).
  5. Click Send. The guest receives a meeting invitation with a join link.
  6. The guest can join the meeting from:
    • The Teams desktop or mobile app (if they have it installed).
    • The Teams web app (no installation required).
    • By dialing in via phone (if a dial-in number is included).

6. Manage Guest Members in Your Team ​

As a team owner, you can review and manage guest access at any time.

View Current Guests ​

  1. Click the three-dot menu (⋯) next to the team name.
  2. Select Manage team.
  3. Click the Members tab. Guests are listed with a (Guest) label next to their name.

Remove a Guest ​

  1. In the Members tab, find the guest you want to remove.
  2. Click the X next to their name.
  3. Confirm removal. The guest immediately loses access to the team, its channels, files, and chat history.

Change Guest Permissions ​

  1. In Manage team > Settings, you can control:
    • Whether guests can create, update, or delete channels.
    • Whether guests can delete messages in channels.
  2. Finer guest controls, such as restricting screen sharing or file downloads, are set for the whole organization rather than per team. Ask IT to disable the specific capability for guests, and name the team it applies to.

7. Best Practices for Working with External Guests ​

  • Use a dedicated channel — Create a channel specifically for external collaboration (e.g., "External – Partner Project") to avoid exposing internal discussions.
  • Review guest list regularly — Remove guests whose project or engagement has ended. Stale guest accounts are a security risk.
  • Label guests clearly — Edit guest display names to include their company (e.g., "Alex Kim (Vendor Co)") so internal members can easily identify external participants.
  • Avoid sharing sensitive internal files — Use the dedicated external channel's Files tab rather than sharing from internal channels.
  • Brief your team — Let internal members know when guests are present in a channel to avoid sharing confidential information.

Troubleshooting ​

TIP

If you cannot add a guest or start an external chat, the most likely cause is that your IT administrator has disabled guest access or external access at the organization level. These are two separate settings, so name the one you need: ask IT to enable guest access to add outside people to a team, or external access to chat with people at another organization.

Symptom / ErrorPotential CauseSolution
"Add member" does not accept external emailGuest access is disabled by ITContact IT to enable guest access for your tenant.
Cannot find external contact in chatExternal access (federation) is disabledContact IT to enable external access. The other organization must also allow federation.
Guest cannot see files in the channelGuest was added after the files were uploaded to a private channelRe-upload or re-share the files, or move the guest to a standard channel.
Guest cannot join a meetingMeeting link expired or lobby settings block guestsResend the invitation. In Meeting options, set Who can bypass the lobby to include guests.
Guest says "You don't have access"Guest accepted with the wrong accountAsk the guest to sign out, then re-accept the invitation using the same email address that was invited.
External chat messages are not deliveredThe other organization blocks Teams federationFederation has to be switched on at both ends. Ask IT to allow the other company's email domain, and ask your contact there to put the same request to their IT team.