You could reinstall Office 2010 (you may have to temporarily uninstall Office 2016 to do that, to avoid confusing the validation). It's the only way that you will get Outlook to look exactly like 2010.
Both versions can exist on the PC at the same time, and use the same data file(s) but not at the same time.
I have both installed here for support purposes, but frankly prefer Outlook 2016.
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Graham Mayor - MS MVP (Word) (2002-2019)
Visit my web site for more programming tips and ready made processes www.gmayor.com
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