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 commentLea commented
I would like to see an option (to send or not) in the UI when you're creating the group (or at an Admin level). We don't use the default document library and that is more often than not the first link users click on the welcome email.