In Case if CRM queues did not receive incoming (Track) emails from INTERNAL users and able to track outside users sent emails without any problem.
1) Navigate to SETTINGS –> ADMINISTRATION –>SYSTEM SETTINGS –> EMAIL, the box “Track emailsSent between Dynamics 365 users as two activities” must be CHECKED
2) Use the OrgDBOrgSettings tool and install it as a solution where it is called “OrganizationSettingsEditor”.3) After opening, look for the value DoNotIgnoreInternalEmailToQueues. The default is FALSE. That must be changed to TRUE as the bottom text explains.As show in below screen shot…

