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Use cases → Scheduling

Schedule calendar events across many users in bulk

Automate the creation of large numbers of events on user calendars for training, maintenance or campaigns using a delegated service account.

Who it is forIT automation teams and admins managing events for hundreds or thousands of users.
APIsCalendar API
Typical scopescalendar

The problem

Manually adding events for large groups is error-prone and slow, and shared calendars do not guarantee user-level visibility or reminders. Bulk creation by script is the only practical option, but must be coordinated to avoid duplication and ensure all users are covered.

How it works

  1. Prepare a list of target users from the directory or a group.
  2. Impersonate each user via domain-wide delegation using a service account.
  3. Create the event directly on each user's primary calendar with the required details.
  4. Log event IDs and any errors per user for reconciliation.
  5. Optionally, re-check for missing events after propagation delays and retry as needed.

What changes

Every user receives the event on their own calendar, with reminders and visibility matching a direct invite, and admins have an auditable trail.

The trap in this one. The Calendar API batchCreate endpoint does not guarantee atomicity: if a request fails for one user (for example, due to a conflicting event or quota), the API will silently succeed for others, returning only partial errors. Without strict reconciliation after the run, some users will never receive the event and there is no built-in retry. Always compare expected and actual event IDs and re-attempt only for failures, or you will end up with silent gaps.

Questions people ask

Can you invite users as guests instead?

You can, but invited events can be declined or ignored, and do not always surface identically to directly created events. Direct creation guarantees it lands in their calendar.

Does this trigger user notifications?

Yes, unless you suppress notifications in the API call. By default, users receive the standard new event notification.

Want this built?

This is a pattern we run in production. We will set up the delegation and build this on top of it — $500 per hour, most of it working the same day.

Talk to us Or read the setup guide

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