Hi Greg, We're running into this exact issue as well. I was hoping it would be resolved at 10.6.1 but nope. Switching from MS Office 2016 to adding a xlsx file to ArcMap requires installing that 2007 driver. Very annoying and would be even more annoying if I didn't have local admin rights on my machine to install software. Have you found a better solution to this since posting the above?
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