Som nævnt: De nye funktioner findes, hvis man har Online eller Subscription udgaver af Excel 2016 - de findes IKKE i Standalone/Desktop udgaven af Excel 2016!
Jeg har lige testet hos mig selv, og i min Desktop udgave findes funktionerne ikke, men i min Online version findes funktionerne (begge Excel 2016).
Dette har været "diskuteret" utallige gange på nettet.
Se bl.a. Microsoft eget forum her:
https://answers.microsoft.com/en-us/office/forum/office_2016-excel/new-excel-2016-functions-not-working-in-desktop/cef17d5f-c914-4442-81ec-38d0b10e828a...hvor Microsoft selv giver svaret:
"If you do not have an Office 365 subscription, then you won't get the new functions. You said you installed "Office 2016 Standard", which sounds like you made a one-time purchase of Office 2016 rather than a subscription. With a subscription, you receive ongoing upgrades including new features, but if you buy a one-time purchase of Office, then it will only have the features that were available at the initial release of Office 2016. You can determine whether you have a subscription product by going to File > Account. If you see that it says "Subscription Product", then you have a subscription. Otherwise it will say "Product Activated", which is an indication that it is not a subscription."
Jeg er sikker på, at spørgeren blot har Standalone/Desktop versionen, og derfor har han heller ikke de nye funktioner - hvis hans formel virkede for 6 måneder siden, så var det på en anden udgave af Excel!