Masterpoint runs on Google Workspace, and a number of our clients run on Microsoft 365 / Outlook. Unfortunately, Google and Microsoft calendars don't fully cooperate: certain changes we make to meeting invites on our end don't reliably show up on yours. This is a well-documented interoperability gap between the two platforms and not something either of us is doing wrong. But it can cause real confusion. This page explains what you might see, why it happens, and how to work around it.

What You Might See

• A meeting we cancelled still appears on your Outlook calendar
• Two copies of the same meeting after we reschedule it
• A meeting we moved still showing at its old time
• An outdated Zoom link on your copy of the invite
• Colleagues who received the invite via forwarding seeing stale details that never update

Why It Happens

• Outlook doesn't automatically remove cancelled meetings from external organizers. When we cancel a meeting from Google Calendar, Outlook attendees receive a cancellation email with a "Remove from Calendar" button — but the meeting stays on your calendar until someone clicks it. If that email is missed or filtered, the stale meeting lives on indefinitely.
• Forwarded invites never receive updates. If someone forwards our calendar invite to a colleague, that colleague isn't on the official guest list — so their copy of the meeting is frozen in time. It will never reflect reschedules, cancellations, or Zoom link changes.
• Email security filtering. Calendar updates travel as emails behind the scenes. Some corporate mail security tools quarantine or filter these messages, so the update silently never arrives.

How to Avoid Problems on Your Side

• When you receive a cancellation email, open it and click "Remove from Calendar." Outlook will not remove the meeting on its own.
• Please don't forward our invites. Instead, send us the names and email addresses of anyone who should attend, and we'll add them directly to the invite — that way they receive every update going forward.
• When in doubt, trust the most recent update — and if you're ever unsure whether a meeting is happening or which Zoom link is correct, just ask us in our shared Slack channel.
• If our invite updates never seem to arrive, it may be worth asking your IT team to check whether calendar emails from masterpoint.io are being filtered or quarantined.

What We Do on Our Side

We follow internal practices to minimize this — we edit existing invites rather than cancelling and recreating them, we keep Zoom links consistent, and we add all attendees directly to the guest list. But because the final step of processing an update happens inside Outlook, some of this is unfortunately outside our control.

Questions?

Reach out in our shared Slack channel, or contact your Masterpoint point of contact directly. We're happy to re-send an invite or confirm meeting details any time.