We are about to undertake an upgrade from Apps9 to Apps10, with intention to eventually get to R1 2021.
We have quite a few custom configurations (Events, Fields, Menus, API etc)
Wonder, if you have been through the process did you hit any major stumbling blocks? Did you use IFS for the upgrade or a partner and how many issues did you hit when reviewing your configurations and making sure they work for Apps10?
Thanks for input!