What is Calendar Sync?

How Calendox calendar sync works — one-way and multi-way syncs between Google Calendar and Outlook, real-time propagation, and plan limits.

A sync is a rule that keeps two or more of your calendars in step. Calendox copies events between Google Calendar and Microsoft Outlook — within one provider or across both — and from then on every create, edit, and deletion propagates automatically, so a meeting added in one calendar blocks the time everywhere.

Syncs come in two types: a one-way sync copies events from one source calendar into one or more targets, and a multi-way sync keeps two or more calendars mutually identical, whichever one you edit.

One-way or multi-way?

	One-way sync	Multi-way sync
Direction	Source → targets only	Every calendar ↔ every other
Calendars	Exactly 1 source, 1 or more targets	2 or more, all equal
Edits in a target	Never pushed back	Propagate to all others
Typical use	Mirror work Outlook into personal Google	Manage the same schedule from any calendar

Both types work across providers — Google to Outlook, Outlook to Google, or within one provider — and both are included on every paid plan and during the trial.

How fast do changes sync?

Changes propagate in seconds. Calendox registers for push notifications with each calendar's provider, so Google and Microsoft notify Calendox the moment an event changes — there's no polling schedule to wait on. Calendox renews these registrations automatically for as long as the sync exists.

What does the initial copy cover?

When you create a sync, Calendox first copies the calendars' existing events — everything from the start of the previous month up to one year ahead, recurring series included. The sync shows Pending while this runs and Active once it's done; from then on, changes flow in real time as they happen. See Sync status for every status value.

What do synced copies look like?

You control what each copy carries when you create the sync: which event fields to include (title, description, participants, location, meeting link), a Clone Identifier label that marks copies so you can tell them apart from originals, an option to create copies as private events, and an option to create them without reminders so you're not notified twice. See Create your first sync for the full walkthrough.

Every copy also carries internal sync metadata so Calendox always recognizes its own copies and never re-copies them — see Sync protections for how loops and duplicates are prevented.

Calendox doesn't store your event content on its own servers — titles, descriptions, and locations pass through to the provider and are never written to the Calendox database. See How Calendox Protects Your Data.

How many calendars and syncs can I have?

Plan	Connected calendars	Sync slots
Trial (14 days)	25	25
Basic	2	2
Standard	5	5
Premium	25	25

Each individual calendar you import counts as one connected calendar. See Plans and billing for the full comparison, or pricing to subscribe.

Guides

Create your first sync — the step-by-step setup walkthrough.
One-way sync — mirror one calendar into others.
Multi-way sync — keep calendars mutually identical.
Sync status — what each status means and how to fix a stuck sync.
Sync protections — the safeguards that prevent duplicates and loops.

For a feature overview, see the Calendar Sync feature page.