1,178 votestry this instead · AdminMicrosoft 365 Groups Feedback (Product Owner, Microsoft Office 365) responded
Disabling the welcome mail is possible with an extra parameter in the Set-UnifiedGroup cmdlet in Exchange PowerShell: -UnifiedGroupWelcomeMessageEnabled:$false. See https://docs.microsoft.com/en-us/powershell/module/exchange/users-and-groups/set-unifiedgroup
Use this as a part of a custom group creation flow if you would like to restrict and/or customize the welcome mail for many groups across your tenant.
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Yes, there must be an option / checkbox for group owner(s) to decide whether a email notifications will be sent out or nor.
You just don’t want everyone gets email notifications sine they are added in a Group. This is way this group is not being used much now. Thx.
The functionality to make it possible to change the name of an O365 tenant, especially with Sharepoint Online in mind, is being planned. There is no ETA at this time though.