What’s changing
Now, when you have an Out of office (OOO) entry on your calendar, a notice of that OOO status will appear in Gmail and Hangouts Chat when people try to contact you.
In Gmail, a banner is shown about the recipient being out of office and when they’ll be back in the email compose window.
In Hangouts Chat, a small notification in the chat compose window alerts you that the person you’re trying to message is out of office.
Why would you use it
With this launch, before people even hit “send,” your time out of office is visible in more places across G Suite, meaning the user gets more uninterrupted time away. As a sender, the user will also have more confidence that you’re messaging people at an appropriate time.
Additional details
If a user likes to disable sharing of availability information to other G Suite apps, he/she can do so in Calendar under Calendar settings > Access permissions. Just by deselecting “Show calendar info in other Google apps, limited by access permissions.”
Availability:-
It is Available to all Google Workspace editions