We receive two email notifications on creation of Office 365 group.
User Welcome Email – Saying that user have been added. We can disable this notification using the Power shell.
Welcome Email – saying that SP site name and calendar etc. To disable this notification or redirect , the only option I can think of is using Mail flow rules in Exchange online.
You can use mail flow rules (also known as transport rules) to identify and take action on messages that flow through your Office 365 organization. Mail …
I hope this will help you. Happy SharePointing 🙂