Adding Members via Teams interface to the created Team generates a welcome to group email.

[richwright]

The Owners and initial members receive the welcome to group email as part of the graph api step to create a group before adding a team.
When you add new members using the Teams interface is it possible to disable the welcome to group message?

[alexc-MSFT]

@richwright this is a good point and yes it can be disabled with an update to the code, see this property in the REST API -

resourceBehaviorOptions | String collection | Specifies the group behaviors that can be set for a Microsoft 365 group during creation. This can be set only as part of creation (POST). Possible values are AllowOnlyMembersToPost, HideGroupInOutlook, SubscribeNewGroupMembers, WelcomeEmailDisabled. For more information, see Set Microsoft 365 group behaviors and provisioning options.
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from here - https://docs.microsoft.com/en-us/graph/api/resources/group?view=graph-rest-beta

I'm going to make this change as I think the welcome email for the group should be disabled.