I'm writing a macro to copy all personal-settings files from a user's local drive to OneDrive so that when they get a new or re-imaged computer, the files can be copy back the new machine. This is for a group of sophisticated users who have highly customized Word and may have customized other Office apps.

Here's my list -- am I missing anything?

• All Office Templates
  C:\Users\%username%\AppData\Roaming\Microsoft\Temp lates\

• All Office quick access toolbars and ribbon customizations
  C:\Users\%username%\AppData\Local\Microsoft\Office \

• The newer, roaming custom dictionary
  C:\Users\%username%\AppData\Roaming\Microsoft\Offi ce\16.0\daa7b484\Proofing\RoamingCustom.dic

• Older custom dictionary, still used by some
  C:\Users\%username%\AppData\Roaming\Microsoft\UPro of\CUSTOM.DIC

• AutoCorrects not in Normal template
  
  
  C:\Documents and Settings\%username%\Application Data\Microsoft\Office\MSO1033.acl

• Custom building blocks
  C:\Users\%username%\AppData\Roaming\Microsoft\Docu ment Building Blocks\1033\16\Building Blocks.dotx

• Exclusion dictionary
  C:\Users\%username%\AppData\Roaming\Microsoft\UPro of\ExcludeDictionaryEN0409.lex

• Startup folder for macros
  C:\Users\%username%\AppData\Roaming\Microsoft\Word \STARTUP

Other files:

• Excel XLSTART folder for macros (Personal.xlsb), custom book and sheet templates
  C:\Users\%username%\AppData\Roaming\Microsoft\Exce l\XLSTART\

• Outlook custom signatures
  C:\Users\%username%\AppData\Roaming\Microsoft\Sign atures\

• Recent-files list
  C:\Documents and Settings\%username%\Application Data\Microsoft\Office\Recent\

See the pinned thread here: Word 2007 & Later Key Data File Locations as far as I know, it is up-to-date for current versions of Word.
See also my page: Moving (Sharing) Customizations in Microsoft Word
Word option settings often require recording a macro to store them. They are mostly stored, I believe, in the registry Data key. I know of no one who has decoded that key.

You are dealing with default locations and your users may have modified those.

For non-Word customizations, you may want to post in those forums.

Super helpful -- thanks, Charles!

You are welcome.