Data Synchronization - Overview

Overview: Data synchronization with mailbox

mailbox Office provides a variety of interfaces to securely and efficiently synchronize your data with different devices.
These include:

• Mail via IMAP & SMTP
• Calendar & Tasks via CalDAV
• Address book via CardDAV
• Files via the Drive Client, WebDAV, or the web interface

Recommended methods by data type

Data type	Recommended method
Mail	IMAP & SMTP
Calendar & Tasks	CalDAV
Address book	CardDAV
Files	Drive Client, WebDAV, or web interface

Synchronization periods and limitations

Method	Past	Future	Max. number	Special notes
IMAP / POP3	unlimited (mails)	unlimited	unlimited	–
CalDAV	30 years (calendar)	10 years	–	–
CardDAV	no restrictions (addresses)	–	–	–
ActiveSync	3 years (calendar), 18 months (mails)	3 years (calendar)	500 mails/folder	Limited functions: no recurring tasks, max. 36 kB contact picture size

Note: ActiveSync was developed for fast synchronization on mobile devices – for large or older mailboxes we recommend IMAP and CalDAV/CardDAV.

Drive storage by plan

Plan	Drive usage
Light	only as a team member
Standard	full access (file size up to 1 GB)
Premium	full access (file size up to 1 GB)

System support by platform

Platform	Mail	Calendar	Address book	Files
macOS	IMAP, POP3, SMTP (Apple Mail, Thunderbird)	CalDAV (Calendar.app)	CardDAV (Contacts.app)	Drive Client & WebDAV
Linux	IMAP, POP3, SMTP (Thunderbird, KMail etc.)	CalDAV (Evolution)	CardDAV (Evolution)	WebDAV
Windows	IMAP, POP3, SMTP (Outlook, LiveMail etc.)	CalDAV (CalDAV Synchronizer)	CardDAV (CalDAV Synchronizer)	Drive Client for Windows
Android	IMAP, POP3, SMTP or ActiveSync	CalDAV or ActiveSync	CardDAV or ActiveSync	Drive Client for Android (Play Store)
iOS / iPadOS	IMAP, POP3, SMTP or ActiveSync	CalDAV or ActiveSync	CardDAV or ActiveSync	Drive Client for iOS (App Store)
Other smartphones	IMAP, POP3, SMTP or ActiveSync	CalDAV or ActiveSync	CardDAV or ActiveSync	–