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.
An error occurred while saving the commentJoerg Renggli commented
This is still an issue in 2019 !!