859 votestry this instead · AdminMicrosoft 365 Groups Feedback (Product Owner, Microsoft Office 365) responded
While you cannot customize the default welcome mail for Office 365 Groups, 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 commentKen N commented
+1 here, We use these for our project initiations, be nice to add some customizatins on this. At least the basic message. "Project X has been Initiated"