We currently have emails enabled to create tickets when anyone emails XXX@VIZpin.com. However, when one particular employee of ours, XXX.XXXl@vizpin.com sends an email to that email address, nothing happens. There's no notification to the user it was rejected and no ticket is created (the email itself, is received in the O365 inbox). We tried to manually add that user as a customer, and receive an error message simply that that user cannot be added. All other employees can send emails and create tickets as needed, so can't figure out why one user is unable to. This was a previous JIRA user, but no longer has access so not sure if that's related?