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\part{Synchronization}
Horde provides several techniques and supports a number of protocols to enable synchronization between Horde applications, resp. Horde Groupware, and large variety of external clients.

Horde supports the following synchronization protocols:

\begin{itemize}
\item <a href="https://wiki.horde.org/ActiveSync">ActiveSync</a>


\item <a href="https://wiki.horde.org/CalDAV">CalDAV</a>


\item <a href="https://wiki.horde.org/CardDAV">CardDAV</a>


\item <a href="https://wiki.horde.org/WebDAV">WebDAV</a>


\item <a href="https://wiki.horde.org/SyncML">SyncML</a>


\end{itemize}
\section{Features}
For a more detailed feature grid, please see the individual protocol's pages. The number refers to the minimum Horde version required for full read-write support.

<table class="horde-table">Protocol & Email & Contacts & Events & Tasks & Notes & Discovery \\
\hline
<a href="https://wiki.horde.org/ActiveSync">ActiveSync</a> & 5.0 & 4.0 & 4.0 & 4.0 & 5.1 & 5.0 \\
\hline
<a href="https://wiki.horde.org/CalDAV">CalDAV</a> & - & - & 5.1 & 5.1 & - & 5.1 \\
\hline
<a href="https://wiki.horde.org/CardDAV">CardDAV</a> & - & 5.1 & - & - & - & 5.1 \\
\hline
<a href="https://wiki.horde.org/WebDAV">WebDAV</a> & - & - & 3.2 & 3.2 & - & - \\
\hline
<a href="https://wiki.horde.org/SyncML">SyncML</a> & - & 3.0 & 3.0 & 3.0 & - & - \\
\hline
</table>
\section{Clients}
This is just a generic overview about the supported clients or device category. For details about supported versions or models, see the individual protocol's pages. Legend: B = builtin, b = partially builtin, E = external app/program/plugin required.

<table class="horde-table">Client/Device & <a href="https://wiki.horde.org/ActiveSync">ActiveSync</a> & <a href="https://wiki.horde.org/CalDAV">CalDAV</a> & <a href="https://wiki.horde.org/CardDAV">CardDAV</a> & <a href="https://wiki.horde.org/WebDAV">WebDAV</a> & <a href="https://wiki.horde.org/SyncML">SyncML</a> \\
\hline
\textit{Desktop Clients} &  &  &  &  &  \\
\hline
Outlook & B (Since 2013) & ? & ? & ? & ? \\
\hline
Thunderbird/Lightning & E & B & E & B & E \\
\hline
Evolution & ? & ? & ? & ? & ? \\
\hline
Kontact & ? & ? & ? & ? & ? \\
\hline
\textit{Mobile Devices} &  &  &  &  &  \\
\hline
Android & B & E & E & E (1) & E \\
\hline
iOS & B & B & B & - & ? \\
\hline
Windows Phone & B & ? & ? & ? & E \\
\hline
Blackberry & B (Since BB10) & B & B & ? & ? \\
\hline
</table>
(1)Support for such an <a href="https://wiki.horde.org/WebDAV">WebDAV</a> based Appointment sync is provided e.g. by following Android App <a href="https://play.google.com/store/apps/details?id=com.icalparse">CalendarSync</a>

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