Public Teams Link

Hi johngallagher,

To invite members to a public team in Microsoft Teams, you can follow these steps:

1. If you're a team owner, go to the team name in the teams list and click More options > Add member.
2. Start by typing a name, distribution list, security group, or a Microsoft 365 group.
3. You can also add people outside your organization as guests by typing their email addresses.

People that you add to a team will receive an email letting them know they are now a member and the team will appear in their teams list.

However, if you're trying to send a mass invite to a public team to a bunch of members of your organization, when we schedule the meetings in Teams calendar, we can only invite them individually. This means you need to type them in the "Required" field manually.

Alternatively, you can try to create a Channel meeting. In this way, all the members in that team can join that meeting without you inviting them individually. Or if you have the chance to create the Teams meeting from Outlook desktop client, and those members are in any Office 365 group, you can add the group to the "To:" field. In this way, all the members will be invited at once.

(1) Add members to a team in Microsoft Teams - Microsoft Support. https://support.microsoft.com/en-us/office/add-members-to-a-team-in-microsoft-teams-aff2249d-b456-4bc3-81e7-52327b6b38e9.
(2) Adding Entire Teams to a Meeting Invitation - Microsoft Community. https://answers.microsoft.com/en-us/msteams/forum/all/adding-entire-teams-to-a-meeting-invitation/d8f53e2d-804e-4d3a-8a2c-ac0e4c16a1e4.