NextCloud is most commonly used as an alternative to something like Dropbox. However, it is fairly easily extended to support a variety of use cases, and ours most is most definitely different. The primary goal of our release it NextCloud was to provide a stable offering of CalDAV and CardDAV, which used your email accounts as authentication. NextCloud happens to provide one of the best solutions for this. Of course, additional features are there and usable.
NextCloud at MXroute offers:
File storage, Photo galleries, Notes, Contacts, Calendars, An email client
Every email account you create in DirectAdmin is a NextCloud account with 10GB of storage. Please do not create email accounts for the sole purpose of gaining extra NextCloud storage, this is meant only to complement your email accounts and is not counted against the quota you purchased at signup.