# Authorization

## Meeting Agents
Sending a Meeting Agent directly to a meeting needs only
[application authentication](https://docs.cronofy.com/api-reference/authorization/authentication/index.md):
call [Schedule/Send a Meeting Agent](https://docs.cronofy.com/api-reference/conferencing-and-transcription/meeting-agents/schedule/index.md)
with the application's `client_secret` and the meeting's join URL. No calendar
authorization is involved.

When a Meeting Agent should join a calendar event, you
[provision it as part of the event](https://docs.cronofy.com/api-reference/conferencing-and-transcription/meeting-agents/provisioning/index.md)
when [creating or updating the event](https://docs.cronofy.com/api-reference/calendar-control/calendar-events/upsert-event/index.md).
That call uses the calendar account's `access_token`, so it needs one of the
methods in [Modular calendar and availability control](https://docs.cronofy.com/developers/calendar-and-availability/authorization/index.md).

For Zoom meetings Cronofy didn't create, the meeting owner completes a
one-time [Zoom authorization](https://docs.cronofy.com/developers/conferencing-and-transcription/meeting-agents/zoom/index.md).

## Conferencing
Conferencing is added to events through the calendar account's `access_token`,
as above. Conferencing services such as Zoom or Webex are then connected in
one of two ways:

- **Individually**: each user authorizes their own conferencing account.
[Conferencing Service Authorization](https://docs.cronofy.com/api-reference/conferencing-and-transcription/conferencing-services/authorization/index.md)
generates the link to send them through, so the authorization is linked to
their Cronofy account. See
[With the user's own conferencing service](https://docs.cronofy.com/developers/conferencing-and-transcription/conferencing-services/index.md).

- **For an Organizational Unit**: an administrator authorizes the company's
conferencing service once, and every member can use it without authorizing
individually. See
[Enterprise Conferencing](https://docs.cronofy.com/developers/conferencing-and-transcription/conferencing-services/enterprise-conferencing/index.md).



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