Attachment is missing in notification email received when assigning a ticket to Technician

Attachment is missing in notification email received when assigning a ticket to Technician

     I installed a free version (Stand Edition service desk plus) on premise.

    When a requester send email with attachment  it is receiving in Service desk portal and able to view it.

 Administrator is assigning that ticket  to a technician by logging in to the portal(server where it is installed).The  assigned technician is receiving  the email notification  (in outlook) but without attachment. 


So every time technician need to login to application to download the attachment when he receives an email.
Please help as I am new to manage engine


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