Note: As our world comes together to slow the spread of COVID-19 pandemic, the Zoom Support Center has continued to operate 24x7 globally to support you. Please see the updated Support Guidelines during these unprecedented times.

Advanced chat encryption Follow


Advanced chat encrypted will securely send chat messages between Zoom users. Encrypted messaging encrypts all chat messages using TLS 1.2 with Advanced Encryption Standard (AES) 256-bit algorithm.

This article covers:


  • Zoom desktop client for Windows or macOS, 4.1.8826.0925 or higher
  • Zoom mobile app for Android or iOS, 4.1.8855.0925 or higher

Note: Some older versions of Zoom, including Windows and Mac version 3.5.37712.0111 or higher, iOS version 3.5.37749.0111 or higher, and Android version 3.5. 37712.0111, support advanced encrypted chats, but will not have full functionality.

Limitations after enabling advanced chat encryption 

After you enable advanced chat encryption, users and admins can't use these chat features:



  • View messages in chat history (admins can still see chat participants and the date/time of the last message sent)

Enabling advanced chat encryption

To enable the advanced chat encryption for all members of your organization:

  1. Sign in to the Zoom web portal.
  2. In the navigation menu, click Account Management then IM Management.
  3. Click the IM Settings tab.
  4. Verify that the Enable advanced chat encryption option is enabled.
    If the setting is disabled, click the toggle to enable it. If a verification dialog displays, choose Turn On to verify the change.

Encryption icon

Chats will display a lock icon  to indicate that advanced chat encryption is enabled.



Encrypted chat notifications

If you enable advanced encrypted chat, users will not see the encrypted chat until they open Zoom. Notifications (including those on the lock screen) will display a message that they have received an encrypted chat.