• Files

  • Calendar

  • Contacts

  • E-mail


You can use Thunerbird with the lightning extention to synchronize e-mail, contacts and calendars with IMAP, CardDAV and CalDAV.

Thunderbird doesn’t auto detect the CardDAV and CalDAV links automatically. You have to enter the complete URL’s.

You can find those by using your browser and go to /carddav/addressbooks/<ADDRESSBOOK> or /caldav/calendars/<CALENDAR>

Files - Group-Office Assistant

The Group-Office Assistant is a small program that you can install on your Windows, MacOS or Linux computer. It will automatically download files opened from Group-Office and monitor it for changes. When the file is saved it automatically uploads it back to Group-Office.


On Debian based distributions you can install the Group Office Assistant.

  1. First add our APT repository:

    echo "deb one main" | sudo tee /etc/apt/sources.list.d/groupoffice-assistant.list
  2. Add our public key:

    apt-key adv --recv-keys --keyserver 0758838B
  3. Update APT:

    sudo apt-get update
  4. Then install Group Office Assistant by running:

    sudo apt-get install groupoffice-assistant
  5. Now double click a file in Group Office and it can be edited on your desktop instantly.


For Chrome users. You might be annoyed by the popup dialog everytime you open a file. Here’s a solution for that:


You can use WebDAV to mount Group-Office as a network drive. Linux Desktops have WebDAV built in. For GNOME users you can launch the file explorer and choose “Connect to server” from the menu. Connect the client to:

https://[Server hostname]/webdav