The Zoom service releases the 5.0 version of the app for security
purposes. Applications equal to or less than version 4 will not be
available on after May 30. Although an update notification will be
issued when the application is stopped, please update the application IN
ADVANCE in order to avoid confusion in classes etc. due to updating just
before the meeting.

The method of checking the version and update for the app is as follows
and thank you for your cooperation.

[Windows / Mac / Linux]
Please see zoom-update_en.pdf

[iOS / Android]
Check "Zoom Cloud Meetings " on App Store or Google Play, and update
it if the "Update" button is available.