Exporting Calendars/Contacts from Horde and Importing into Roundcube

Step 1: Exporting Calendar from Horde

• Open the Calendar section.
• Select the “pencil” icon to edit the calendar (personal or shared).
• Open the Export tab.
• Click on the Calendar ICS file link.
• Save the generated file (events.ics) to your device.

Step 2: Switch from Horde to RoundCube in the Plesk Panel

See: https://kb.his.com/kb/article/732-Horde-Webmail-Deprecated-2025-Switch-to-RoundCube

Step 3; Importing Calendars into Roundcube

• Open Roundcube webmail.
• Open Calendar from the left menu.
• Select the calendar in which you want to perform the import. You can create a new calendar by clicking the “three dots” button and selecting Add calendar.
• Choose Import (at the top of the bar).
• Import from file: Click Browse and select the calendar file.
• Calendar: Choose the calendar to import the events to.
• Events from: Choose how far back in time the events to be imported should go. You can select All (all events).
• Complete the process with Import.

Note: The added calendar will only be visible in RoundCube and cannot be shared with other applications.