You can configure a banner that contains a message for the user.
More information
Enabling Terms of Use
You can enable a Terms of Use banner that appears when a user logs in to the Element UI. When the user clicks on the banner, a text dialog box appears containing the message you have configured for the cluster. The banner can be dismissed at any time.
Editing Terms of Use
You can edit the text that a user sees when they select the Terms of Use login banner.
Disabling Terms of Use
You can disable the Terms of Use banner. With the banner disabled, the user is no longer requested to accept the terms of use when using the Element UI.