Office has to be installed as a 32 bit application not a 64 bit application : then Outlook will there again. This took me 2 weeks to figure out after I upgraded from Outlook 2010 to 2016 using QB 2015 Enterprise solutions on a WIN10 Laptop for work..
If outlook is not an option in QB check your office product information .".About Outlook" ..if it is 64 bit ..that is the issue just backup, uninstall and reinstall 32 bit and it should work for everyone..
hope this helps as it was a last resort for me and BINGO!!
