Getting white box when trying to send email as outlook attachment - Acobat Pro DC 2022.003.20258

We migrated from Adobe acrobat 2020 to Acrobat Pro DC for all of our users.  Environment is about 16 citrix session host servers.  Since migrating to Acrobat Pro DC we are having all sorts of issues that we are unable to resolve.  Main issue seems to be, several users are unable to send email as outlook attachment directly from adobe.  They get a white box.  Online cloud options are disabled, send attachment as link is unchecked.  I have done several reg keys etc.  Nothing seems to work.   We are considering going to foxit since it seems to work.  Really dont want to deal with user training, etc.

Thanks for the help.