Adobe LMS: Track Mails sent to users

Wondering if others have faced this issue.  We have some users who haven't received an email for registration on the Adobe LMS, or registration for any courses.  Although the number of such users is very low, it would be good if there was a way to track the emails sent to users.

I have tried the following options, but none of them worked:

1) Send the Welcome email from the User Management screen

2) Select the user and "Register" once again from the User Management screen

3) Delete and re-add the user

Have been searching through the forums and havent found a way to track this yet.

Regards,

Ash