haithamramadan v0.2.1 will work in 1.17.x as well as older versions 
osTicket v1.15.4 > Time Based Routing of Emails to Departments
5 days later
- Edited
AdamDempsey Sorry for the very late reply. I confirm that v0.2.1 solved my problem and now I have the plugin working perfectly. Thanks so much Adam for your fast response and brilliant work.