Hoping someone else has seen this issue.
I have a group of internal employees with 2 separate JIRA Service test instances that other internal employees email (using Office365) into. User we'll call her Pam emailed xyz@abc.com (Jira Service Desk #1) at 9:35 yesterday morning. At 2pm that same day she email def@abc.com (Jira Service Desk #2) In the mail handler processing log within Jira Service desk #2 I can see that her second email did come into def@abc.com mail handler but it didn't create a new ticket. Instead Jira added her second email as a comment to her first email in Jira Service Desk #1.
Sorry if that is clear as mud. Thank you in advance of any help.