We have updated our Copy Plan experience – please try it out today!
This improvement includes the ability to choose an existing group or team to copy the plan into (or choose to create a new group). You’ll also be able to customize what gets copied over. Attachments can only be copied over into existing groups/teams.
You can get more details here – https://techcommunity.microsoft.com/t5/planner-blog/expanding-the-copy-plan-and-filtering-features-based-on-your/ba-p/1483491
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When a plan is copied, it remains linked to the original plan. So, say I have a new project that's going to have a similar scope to an existing project, but may have some additional tasks or tasks that don't apply to the plan I'm copying. If I make changes to the copied plan, the original plan changes, as well. The purpose of copying a plan is so you don't have go through the busy work, recreating all the tasks for your next plan. If the plans are exactly the same and every change you make to one plan also changes in the other plan, what's the point of having 2 copies of the exact same thing? Just because a task is added, subtracted or completed on one plan doesn't mean it is the same on the other. This makes no sense. Am I missing something?