---
type: concept
title: CalDAV
tags: [protocol, synchronization, calendar]
related: [davx5, groupware, carddav, macos, outlook-caldav-synchronizer, mozilla-thunderbird]
created: 2026-07-01
updated: 2026-07-01
sources: ["output/rz_uni_greifswald_de_dienste_webdienste_groupware_sync_android.md", "output/rz_uni_greifswald_de_dienste_webdienste_groupware_sync_ios.md", "output/rz_uni_greifswald_de_dienste_webdienste_groupware_sync_macos.md", "output/rz_uni_greifswald_de_dienste_webdienste_groupware_sync_outlook.md", "output/rz_uni_greifswald_de_dienste_webdienste_groupware_sync_thunderbird.md"]
---

# CalDAV

**CalDAV** (Calendar Extensions to WebDAV / Calendaring Extensions to WebDAV) is the internet standard network protocol used for synchronizing calendar and scheduling information (calendar data) between a server and a client application.

## Functionality
CalDAV allows users to:
- Access calendars hosted on a central server from various devices.
- Synchronize changes made locally in a calendar client back to the server.
- Manage multiple calendars (e.g., personal and professional) through a single interface.

## Implementation at Universität Greifswald

At the Universität Greifswald, CalDAV is used as the primary protocol by the [[groupware]] service to share and synchronize calendar events across different devices, including mobile devices, desktop clients, and native clients on various operating systems. This allows users to manage their university appointments locally while ensuring the data remains synchronized with the central server.

### Connection Details
- **Server Address:** `groupware.uni-greifswald.de`
- **Authentication:** Requires the [[zentraler-nutzeraccount]] credentials.

### Platform Integration

#### Android
According to the Android-specific documentation, Android does not support CalDAV natively, requiring additional tools to facilitate the connection and implement synchronization:
- [[davx5]] is used as a client to enable this functionality.

#### iOS
According to the iOS-specific documentation, CalDAV is configured on [[ios]] as a specific account type under the "Other" category. This ensures the device can read and write calendar events directly on the university server.

#### macOS
For macOS native synchronization, the following parameters are required:
- **Server**: `groupware.uni-greifswald.de`
- **Configuration**: Manual account setup is required to ensure correct connectivity.

#### Microsoft Outlook
Because some clients, such as [[microsoft-outlook]], do not support CalDAV natively, third-party tools like the [[outlook-caldav-synchronizer]] are required to facilitate the connection.

#### Mozilla Thunderbird
CalDAV is used to synchronize the [[groupware]] calendar with desktop clients such as [[mozilla-thunderbird]].