Setting multiple materials to Two sided at once

Hi guys, I am working on a large project for an architectural fly-through. I have been importing models for 3DS max using Datasmith. When imported, the materials come through perfectly find however are only one sided, I wanted to know if there was any way I can select all the materials at once and change them to two sided rather than having to go through hundreds of materials and set them all to two sided individually?

Thanks!

You could do an editor utility widget with that code inside

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