Send Messages Use Auto Complete list check box, unchecks

[jshoe]

Every time I quit Outlook 2019, when I open it back up the check box in
File/Options/Mail/SendMessages/Use Auto-Complete list to suggest names when typing check box is gone, somehow it wont save when I close outlook. When I open Outlook my auto fill in the To, CC or Bcc does not work. I go back to File/Options/Mail/SendMessages and the check box for, Use Auto Complete is unchecked. I have tried everything from repairing the .pst file, renaming the stream auto complete file in my Roamcache, Uninstalling Outlook and re-installing it and I have no idea why it continues to do this. Any help would be appreciated.