# Connect your first calendar

For Kalender Sync to do its job, you connect at least one calendar account. In the dashboard, open **"Connect calendar"** and pick your provider.

<Frame src="/images/app/en/connect-modal.webp" alt="“Connect calendar” dialog with Google, Microsoft, Apple iCloud, GMX, WEB.DE, mailbox.org, KSuite and iCal feed" caption="The “Connect calendar” dialog in the dashboard with all available providers." />

## Video: Connect your calendar in 2 minutes

<YouTube id="xc2yAxmIGos" title="How to Connect Your Calendar in Kalender Sync (Google, Outlook & more)" poster="/images/video-posters/xc2yAxmIGos.jpg" maxWidth="800px" />

## Which provider fits you?

| Your calendar lives at … | Connection type | Plan | Guide |
| --- | --- | --- | --- |
| <img src="/images/icons/google.svg" alt="" class="ks-provider-icon" /> Google / Gmail / Google Workspace | Account sign-in (OAuth) | Free | [Connect Google](https://docs.kalender-sync.de/en/connect-calendar/google/) |
| <img src="/images/icons/outlook.svg" alt="" class="ks-provider-icon" /> Outlook / Microsoft 365 / Exchange | Account sign-in (OAuth) | Free | [Connect Microsoft](https://docs.kalender-sync.de/en/connect-calendar/microsoft/) |
| <img src="/images/icons/apple.svg" alt="" class="ks-provider-icon" /> Apple / iPhone / iCloud | App-specific password | Basic+ | [Connect Apple iCloud](https://docs.kalender-sync.de/en/connect-calendar/apple-icloud/) |
| <img src="/images/icons/gmx.svg" alt="" class="ks-provider-icon" /> GMX | App-specific password | Basic+ | [Connect GMX](https://docs.kalender-sync.de/en/connect-calendar/gmx/) |
| <img src="/images/icons/webde.svg" alt="" class="ks-provider-icon" /> WEB.DE | App-specific password | Basic+ | [Connect WEB.DE](https://docs.kalender-sync.de/en/connect-calendar/webde/) |
| <img src="/images/icons/mailboxorg.svg" alt="" class="ks-provider-icon" /> mailbox.org | Application password | Basic+ | [Connect mailbox.org](https://docs.kalender-sync.de/en/connect-calendar/mailboxorg/) |
| <img src="/images/icons/ksuite.svg" alt="" class="ks-provider-icon" /> Infomaniak / KSuite | App password | Basic+ | [Connect KSuite](https://docs.kalender-sync.de/en/connect-calendar/ksuite/) |
| <img src="/images/icons/ical.svg" alt="" class="ks-provider-icon" /> Anything else with an iCal/ICS link | Feed URL (source only) | Basic | [Add an iCal feed](https://docs.kalender-sync.de/en/connect-calendar/ical-feed/) |

Missing your provider? Email [support@kalender-sync.de](mailto:support@kalender-sync.de) — we can enable most providers within a few days.

Providers not included in your current plan appear greyed out in the dialog with a lock icon and a plan hint — upgrading unlocks them immediately ([Plans & limits](https://docs.kalender-sync.de/en/account-billing/plans-limits/)).

## What happens when you connect

**Google and Microsoft** open the provider's own sign-in window. There you confirm access to your calendars — Kalender Sync needs read **and** write access so it can create blocker events and clean them up again. Exactly which permissions are requested and why is covered in [Permissions in detail](https://docs.kalender-sync.de/en/privacy-it/permissions/).

**Apple iCloud, GMX, WEB.DE, mailbox.org and KSuite** don't use a sign-in window but an **app-specific password** that you create with the provider beforehand — your regular password deliberately won't work there. Step-by-step guides are on the respective pages.

## Select calendars

After connecting, Kalender Sync shows all calendars of the account in the **"Select Calendars"** dialog. Only tick the ones you actually want to use — you can change the selection any time in the settings.

## If it doesn't work

- Error message like "Need admin approval"? Your organisation is blocking the connection — there are three ways out: [My organisation blocks the connection](https://docs.kalender-sync.de/en/connect-calendar/org-blocked/).
- Other connection errors: [Connection fails](https://docs.kalender-sync.de/en/troubleshooting/connection-fails/).

## Onwards

Calendar connected? Then set up your [first sharing](https://docs.kalender-sync.de/en/getting-started/first-sharing/) now.