In this guide, you can find instructions on adding external contacts in Teams.

With guest access, you can provide access to teams, documents in channels, resources, chats, and applications to people outside your organization.

You can only invite a guest with a Microsoft user (does not have to be a licensed user) to the workgroup.
After you are added to a workgroup as a guest, it may take a few hours before you get access.

Guides

To invite a guest, on the left side tab, click Teams → More options → Add member.
Enter the guest's e-mail address in the field and click the Add ... as guest? button on the gray background.
To confirm the addition, click the Add button.
If the user does not have a name entered, you can also add a name to the guest, which can help other members of organizations to understand more easily who it is.
The invitation to join the workgroup has been successfully sent to the guest's email address. All team members will see a message in the channel thread stating that the team owner has added a guest. All team members can easily identify who the guest is. A label in the upper right corner of a channel thread shows the number of guests in the team, and a label (guest) appears next to each guest's name.

The following steps depend on whether you have already registered your University of Tartu Teams guest account or not.

If you haven't registered your account yet

Ava postkastis olev e-kiri ja vajuta nupule Open Microsoft Teams (eelistatavalt Teams veebirakenduses)
Open your e-mail, find the e-mail from Microsoft Teams and click the Open Microsoft Teams button (preferably in the Teams web application).
In the window that opens, click the Accept button.
In the next window, click Next.
Set up your two-factor authentication (more information can be found in the guide Activating two-factor authentication).
After setting up your two-factor authentication, click the Next or Done button.