Teams Meeting Invite

Dear Dantrayl,

The maximum number of people depends on the meeting organizer’s Microsoft 365 license:

• Microsoft 365 Business Basic, Business Standard, Business Premium, Teams Essentials, or Microsoft 365 A1: up to 300 participants
• Many Enterprise, Frontline, Education, Government, and Teams EEA plans: up to 1,000 participants
• Up to 10,000 invitees can join as view-only attendees in meetings that already have 1,000 participants.
• A video or audio call started from a group chat, rather than a scheduled meeting: up to 20 people 

It is also worth noting that a private group chat itself holds up to 250 people, and only 200 members can be added at the same time, so if you are adding people to a chat instead of a scheduled meeting you may be hitting that limit rather than the meeting one.

For reference:

Limits and specifications for Microsoft Teams - Microsoft Teams | Microsoft Learn

Invite people to a meeting in Microsoft Teams | Microsoft Support

If Teams will not let you add more invitees even though you are below the applicable limit, could you clarify:

• How many people have already been added?
• Are you scheduling from Teams or Outlook?
• Is this a scheduled meeting, channel meeting, webinar, or call started from a chat?
• What exact error message appears?
• Are the invitees internal employees, external guests, or members of a distribution list?

One more thing worth checking: if you are adding a distribution list or a group, the import limit is 3,500 for a distribution list, security group, or Microsoft 365 group, which can also block the action.

I hope this helps. Looking forward to your reply.

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