A: No, because the product doesn’t exist. Any key you find is fake, stolen, or malware.
Microsoft wants you to try the real thing. They offer a one-month free trial of (formerly Office 365 Home). microsoft office professional 2017 product key free
Since “Office Professional 2017” is fake, you might wonder about Office 2016. That was a real release, but free product keys for it are equally dangerous. However, you can buy from authorized resellers (like SoftwareKeep or StackSocial) for around $50-$70. These are leftover stock from the retail channel. A: No, because the product doesn’t exist