// troubleshooting guide · fathom

Fathom Not Joining Microsoft Teams Meetings

Status
Workaround available
platforms:
Microsoft Teams (Windows, Mac, web)
updated:
November 15, 2026
reports:
2
Method
how we research
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RUNBOOK · fathom/not-joining-teams6 FIXES

// quick answer

In Teams, Fathom joins as an anonymous external participant, so tenant policies, the lobby, join verification and end-to-end encryption block it. The organizer or an M365 admin has to allow anonymous joins, admit Fathom from the lobby, and turn off E2EE for that meeting.

Most likely fix: Allow anonymous participants

How to fix it

// try these in order, the most common fix is first

  1. FIX 1Allow anonymous participants

    1. 01Ask your M365 admin to confirm 'Anonymous users can join a meeting' is on at the organization level
    2. 02Confirm the organizer's meeting policy allows 'Anonymous users can join a meeting unverified'
    3. 03Test: open the join link in a private window; if Teams forces sign-in, Fathom is blocked too
    Did this fix it?
  2. FIX 2Admit Fathom from the lobby

    1. 01During the meeting, open Participants
    2. 02Find 'Fathom Notetaker' under waiting in lobby and select Admit
    Did this fix it?
  3. FIX 3Turn off end-to-end encryption for the meeting

    1. 01In Teams open Calendar, select the meeting and choose View event
    2. 02Select Options, then check Advanced protection > End-to-end encryption
    3. 03The organizer turns it off before the meeting starts
    Did this fix it?
  4. FIX 4Review external bot policies

    1. 01Ask your admin to check 'Manage external apps and bots in Microsoft Teams'
    2. 02Keep 'When detected, require approval before joining' and admit Fathom when prompted, rather than disabling bot detection for everyone
    Did this fix it?
  5. FIX 5Use a proper web meeting link

    1. 01Make sure the calendar event has a link starting with https://teams.microsoft.com/l/meetup-join/
    2. 02If it doesn't, recreate it as a standard Teams meeting
    Did this fix it?
  6. FIX 6Create a new link if Fathom was removed

    1. 01If someone removed Fathom, it may not rejoin the same link or recurring meeting
    2. 02Schedule a new meeting link and run a short test call
    Did this fix it?

Symptoms

Fathom Notetaker waits in the Teams lobby, never appears, or the meeting shows as not recorded even though the Teams integration looks enabled.

Why it happens

  • C-01Organization or organizer policy blocks anonymous users
  • C-02Join verification (CAPTCHA) the bot can't pass
  • C-03Lobby holds external participants and nobody admits it
  • C-04End-to-end encryption is on
  • C-05External-bot detection or third-party bot restrictions
  • C-06Calendar event has a teams:/ or msteams:/ deep link instead of a web link
  • C-07Unsupported meeting type: webinars, Live Events, breakout rooms, channel meetings with strict guest rules, GCC/GCC High/DoD

// this guide also covers

  • fathom not joining teams
  • fathom teams lobby
  • fathom notetaker microsoft teams not working
  • fathom teams anonymous

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