App Suite UI (latest)
All versions
Imprint
All versions
Imprint
  • Feature Catalog
    • Mail
      • Reading and organizing
      • Attachments
      • Writing and sending
      • Security and trust
      • Accounts and automation
      • Signatures and templates
      • Working with the other apps
    • Calendar
      • Seeing your day
      • Appointments
      • People and invitations
      • Calendars and subscriptions
      • Rooms and resources
      • Video meetings
      • Search, print and transfer
    • Address Book
      • Contacts
      • Address books
      • Finding people
      • Lists and the other apps
    • Tasks
      • Tasks
      • Task lists and delegation
      • Working with the other apps
    • Drive
      • Working with files
      • Finding and arranging
      • Sharing
      • Storages and capacity
      • Working with the other apps
    • Portal
    • General
      • Getting around
      • Notifications and What's New
      • Settings and appearance
      • Signing in
      • Account and security
      • Onboarding and devices
      • Working with content
      • Sharing and delegation
      • Storage, plans and feedback
    • On a phone
    • Enterprise features
    • Provider Edition
  • Accessibility
    • Accessibility Conformance Report
  • Upgrade Guide
    • Features by release
    • Breaking changes and requirements
  • Deployment Guide
    • Settings list
    • Cookies
    • BIMI
    • OpenCloud Drive Integration
    • Progressive Web App
    • Feedback
    • Upsell
    • Triggers
    • Login page
    • What's New dialog
    • Mail assets
    • Mail rendering and security
    • Outbound proxy
    • All messages folder
    • Unseen messages folder
    • Theming
    • Authentication
    • Browser support
  • Architecture
    • Core UI service
  • Customize & Extend
    • Manifests
    • Toolbars and menus
    • Portal widget
    • Sign In
    • Internationalization

Browser support

The browsers and operating systems this release is tested against, on the desktop and on phones and tablets. A browser outside these ranges may well work; it is not tested, and problems found only there are not supported.

Desktop

Minimum display resolution: 1024 x 768

Supported BrowserVersion
Google Chromelatest version
Mozilla Firefoxlatest & current ESR-Version
Apple Safari18.x
Microsoft Edgelatest version, Chromium-based

Smartphone & Tablet

Minimum display resolution: 640 x 360. The minimum screen size for mobile devices is ensured only for portrait (vertical) mode.

Landscape (horizontal) mode is not explicitly supported, but we aim to ensure the basic functionality of most features whenever possible.

Mobile network connection: Devices not connected a local wifi should at least use a 4G (LTE) internet connection for best results

Operating systemVersionSupported Browser
iOS / iPadOS>=17.7.1, >=18.xSafari
Android>= 10Chrome (latest version)

Progressive Web App

A progressive web app is a web page the browser agrees to treat like an installed application: its own icon on the home screen or desktop, its own window without browser chrome, and a launch that goes straight to the account. Nothing comes from an app store, so nothing has to be approved or updated on the device. What this looks like on a phone is shown under On a phone.

It's important to note that as of the current documentation, Firefox does not fully support Progressive Web Apps, and users may experience various limitations when utilizing our application on this browser.

References

  • Apple OS and Safari version overview
Last Updated: 10/22/26, 1:43 AM
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