Two-way syncs in automation workflows can be dangerous. It can delete your meetings and database.
One day, out of the blue, one of my GoHighLevel automations deleted my Zoom meeting with a prospect.

No warning. No error message. No notification. Just gone.
A prospect can’t delete a Zoom meeting.
They can only cancel or decline from their own calendar. Since it wasn’t me either, the only culprit left was my workflow automation.
After hours of digging, I discovered that Zoom meetings can sometimes be automatically deleted due to integration issues with platforms like GoHighLevel.
If I had known this in advance, I would have designed my automation differently and saved myself a massive troubleshooting headache.
I discovered through forum discussions that when Zoom is integrated with GoHighLevel, specific workflow actions (such as confirming appointments or updating meeting details within GoHighLevel) can sometimes cause Zoom to delete meetings automatically.
I am already aware that Zoom and GoHighLevel integration can sometimes stop working without any prior warning. So this discovery was a new low for my automation workflow.
Then I discovered the root cause of this issue. It's the two-way sync.
GoHighLevel’s integration with Zoom effectively acts as a two-way sync, which means actions triggered in GoHighLevel (such as confirming, modifying, or cancelling appointments) can update or even delete meetings directly in Zoom.
Unlike the Zoom integration, there are no widespread reports of GoHighLevel automatically deleting Calendly meetings.
This is because Calendly integration is a one-way sync (from Calendly to GoHighLevel), so HighLevel does not push updates or deletions back to Calendly.
Since GoHighLevel receives booking data from Calendly but cannot send deletions or edits back to Calendly, accidental changes or workflow errors in GoHighLevel cannot remove or modify the original meetings in Calendly.
This makes a one-way sync integration safer against destructive actions like deletion.
There isn’t a setting in GoHighLevel to strictly enforce a one-way sync with Zoom out of the box.