What’s changing
Beginning August 16, 2021, we will start upgrading users who have the “Chat and classic Hangouts” setting selected to “Chat preferred,” unless you explicitly opt out. Users who already have “Chat only”, “Chat preferred”, or “Classic Hangouts Only” selected, or users with both services turned off will not be affected.
Additionally, the “Chat and classic Hangouts” setting will also be removed for all users in your domain unless you opt out of the upgrade.
If there are affected users in your domain, you will receive an email notification that contains more information and any necessary action that needs to be taken.
Who’s impacted
Admins and end users
Why it’s important
Unless you opt-out, Google Chat will replace classic Hangouts as the default chat application for your affected users.
Beginning late 2021, classic Hangouts will no longer be supported and all remaining users will be migrated to Google Chat. Learn more about the Google Chat upgrade timeline.
Read full article here.