Sync WebDAV and CalDAV calendars with Exchange and Microsoft 365
You run your own calendar server. Your colleagues work in Exchange, Microsoft 365 or Gmail. Everyone still sees the same meetings.
# Example, not a real serverserver https://calendar.example.com/dav/ protocol CalDAV items calendar events direction both ways status connected
WebDAVResources on the web
A standard for working with files and resources on a web server.
CalDAVCalendars on the web
A calendar standard built on top of WebDAV. This is what AddSync reads.
AddSync SyncCalendars in step
Meetings on your server show in the other calendars, in the direction you choose.
How the pieces fit
Your calendar server speaks CalDAV over HTTPS. AddSync reads and writes calendar events through it and passes them to the calendars of your colleagues.
What AddSync syncs from a CalDAV server
| Calendar events | Yes |
| Contacts | No |
| Tasks | No |
| Direction | One way, the other way or both ways, per source |
Connect it in four steps
- Collect the server addressThe CalDAV address of your calendar server.
- Add the sourceConnect the server in AddSync.
- Add your peopleOne by one or by list import.
- Choose the directionOne way, the other way or both ways.
Who this is for
Companies that run their own open calendar server and still need to share meetings with colleagues in Exchange, Microsoft 365 or Gmail. You keep the server you chose. Your colleagues keep the calendar they know.
Acme Corp runs its own calendar server for the engineering team. Liam Brooks in engineering and Emma Carter in sales, who works in Microsoft 365, see each other's meetings and stop booking the same hour.
WebDAV and CalDAV sync questions
Can I sync a CalDAV calendar server with Exchange Server or Microsoft 365?
Yes. AddSync Sync connects CalDAV calendars with Exchange Server, Microsoft 365, Outlook.com, Google Calendar, Apple Calendar (iCloud) and HCL Domino. You choose the direction for every source.
What is the difference between WebDAV and CalDAV?
WebDAV is a standard for working with files and resources on a web server. CalDAV is a calendar standard built on top of WebDAV. A calendar server that speaks CalDAV can be synced.
Does AddSync sync contacts and tasks from a CalDAV server?
No. For CalDAV, AddSync syncs calendar events only.
Can I sync in one direction only?
Yes. One way, the other way or both ways, set per source.
Do I have to give up my calendar server?
No. Your calendar server stays where it is. AddSync connects it with the other calendars your people use.
Which calendar servers are supported?
Servers that offer CalDAV. Tell us which server you run and we confirm it before you start.
How many people can I add?
As many as the number of licenses you bought.
Sync a calendar server with other systems:
Keep your calendar server. Share the meetings.
Start a trial and tell us which calendar server you run.
Microsoft, Exchange and Google are trademarks of their owners. AddSync is an independent product. Liam Brooks, Emma Carter, Acme Corp and calendar.example.com are examples.
