Tamas Cservenak opened MRESOLVER-652 and commented
But IDEA IDE supports only 1.x properties, while Maven 4 (Resolver 2) only 2.x properties. Maven4/Resolver2 should support "legacy" properties as well, as currently IDE support is broken (one does only this, other does only that).
Workaround: in settings.xml (or whatever way you set them) use both.
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