If when opening Excel you get the error
'Sorry, we couldn't find C:/Program Files (x86)/Access Applications/Access Office Integration (Client) n.n.n\Access Office Integration Excel Functions.xll. Is it possible it was moved, renamed or deleted?'
(where n.n.n is the version number) then in the first instance, please check that the Access Office Integration Add-ins are available and enabled. These can be checked in Excel. Click File, Options, Add-Ins, Manage Excel Add-Ins. Click Go.
Check the Excel Add-ins, Com Add-ins and also any Disabled Items.
Finally, please reinstall AOI