Setting Plans default to private

[Amy Straley]

Would love to set the default permissions of new Plans as Private.  Any thoughts on whether this is possible?

[#2]

In Planner there is not such a concept of permissions. A plan can be public or private and you can change this at any time editing Plan details

[#3]

By the way, and thanks to @Tony Redmond you could easily set all plans to Private using the following PowerShell line: Get-UnifiedGroup | Set-UnifiedGroup -AccessType Private