Excel 2016 and 2021 on the same PC

[GMC The Macro Man]

Good morning guys,
Is it possible to have both versions of excel installed on the same PC? I have 2021 and have written a report using basic functions and the odd "array or FILTER or Xlookup". However one of my clients who has 2016 on their device said certain parts of the report don't work.

I joined him on a webex call and could see the calculations returned the wrong outputs or errors but on my PC with 2021 it worked fine so I need to install 2016 on to my device so I can replicate what he is doing

Appreciate any help here

George

 

[Georgiboy]

Not sure about the two versions (i would think not) but I do quite often use the below website to work out what versions functions will work on:
350 Excel Functions

 

[GMC The Macro Man]

Thanks Georgiboy, I will check through these to see if I am using anything that wont work

 

[RoryA]

You should be able to have both 2016 and 2021 installed, but I think you need to install the older version first.