Hello. I am an IT person that has this issue as well as at least one customer that I support.
When attempting to use the Combine Files function in Acrobat DC Pro that involves one or more Excel files, Adobe crashes with an event ID of 1000. Using the combine function for any other file types that do not involve Excel files works without issue. My Office version is 16.0.14326.209210. Adobe version 22.001.20117. Has anyone else experienced this and found a fix? Acrobat and office have been reinstalled.
As described the application is crashing when combining files that include Excel files.
Would you mind sharing the small video recording of the steps you are doing that leads to the crash, for a better understanding? Also, try to repair the installation from the help menu (Win Only) and see if that works.