# I received an invitation

You received an email like "**… wants to share calendars with you**"? Then someone wants to share their availability: their events will automatically appear as blockers in a calendar of your choice. This page walks you through accepting — even if you've never used Kalender Sync before.

## What's in the invitation

The email shows you **who** is sharing, **which calendars** are involved and at what **visibility** (e.g. "Availability only" — then you only see busy times without details). **"Accept invitation"** gets you started.

Good to know: the link is valid for **7 days** and can be used **once**. Until you sign up, you won't receive any further emails.

## Accepting the invitation — step by step

<Frame src="/images/app/en/accept-invite.webp" alt="Accept page with the steps Invitation, Choose calendar and Done" caption="Accepting walks you through three steps: Invitation → Choose calendar → Done." />

1. **Open the link.** You'll see who wants to share with you; accepting walks you through three steps (**Invitation → Choose calendar → Done**).
2. **Sign in.** If you don't have an account yet, registering takes a moment (free) — via email code or with Google/Microsoft ([how signing in works](https://docs.kalender-sync.de/en/getting-started/create-account/)). Afterwards you land back in the invitation.
3. **Choose a target calendar.** You decide where the blockers go:
   - **"Create new calendar"** (recommended) — Kalender Sync creates a dedicated calendar, named after the sender by default; you can change the name freely. Your main calendar stays untouched and you can show/hide the shared events any time.
   - **"Choose existing calendar"** — the blockers go into an existing calendar.
4. **Done.** The initial sync starts in the background and can take a few minutes — you'll receive an email once it's complete.

:::note[No calendar connected yet?]
To accept the invitation, Kalender Sync needs access to a **writable calendar** on your side. If none is connected yet, the dialog takes you straight to connecting one — e.g. a Google or Microsoft account ([guide](https://docs.kalender-sync.de/en/getting-started/connect-first-calendar/)).
:::

:::note[Target on an Infomaniak (KSuite) account?]
With Infomaniak, **"Create new calendar"** often fails ("The calendar could not be created at your provider") — the provider does not reliably provision externally created calendars. In that case, create the calendar directly in Infomaniak Calendar and pick it via **"Choose existing calendar"** ([details](https://docs.kalender-sync.de/en/connect-calendar/ksuite/)).
:::

## What you see — and what you don't

- Depending on the chosen visibility level you see only "busy", title + time, or full details — the sharing person decides this.
- Attendee lists, email addresses and accept/decline responses are **never** transferred.
- The received blockers are **not meant to be edited**: if you change or delete them, the next sync restores them. The events belong to the source side.

## Ending the sharing

You'll find the sharing in your dashboard under **"Shared with me"**. **"End"** stops it at any time — all blockers created by Kalender Sync are automatically removed from your calendar.

## Link expired or invalid?

If you see "Invalid or expired invitation link", the 7-day window has passed or the link was already used. Simply ask the sender to send you a **new invitation**.