How to enable a calendar for the Roundcube webmail on a Plesk server?
By default, the Roundcube webmail does not have a calendar.
There are two ways to use a calendar for email accounts created via Plesk:
- Purchase the extension Plesk Premium Email, it comes with calendar integrated.
- Use Horde webmail, it comes with a calendar and it's supported by Plesk. To set Horde as webmail, follow steps described in the article: How to switch the webmail for a subscription?