Cal.com Not Working With Exchange 2019
Quick answer
Reviewers report Cal.com cannot connect to on-premise Exchange 2019 calendars; Microsoft 365 / Outlook.com calendars work. Use a cloud calendar sync or pick a tool with Exchange on-prem support.
Most likely fix: Move to Microsoft 365
How to fix it
Try these in order — the most common fix is first.
1. Move to Microsoft 365
- Use an Exchange Online mailbox or Outlook.com calendar
- Connect it under Settings > Calendars
Did this fix it?2. Sync via Google Calendar
- Subscribe or sync the Exchange calendar into Google Calendar
- Connect Google Calendar in Cal.com, and mark synced events Busy
Did this fix it?3. Choose an alternative
- If Exchange on-prem is mandatory, compare Microsoft Bookings or Calendly
Did this fix it?
Symptoms
Cannot connect an Exchange 2019 calendar in Settings > Calendars.
Why it happens
- On-premise Exchange is reported as unsupported
- Only cloud Microsoft calendars are available
This guide also covers
- cal.com exchange 2019
- cal.com on premise exchange
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