Hi Guys ,
whenever the issue got updated with the attachement. Jira should read the attachment
Attachment will have the Planned deployment Date , Deployment Start Date , Deployment end date.
I have created custom fields like
Planned deployment Date
Deployment Start Date
Deployment end date.
When they attach the document to the issue then it automatically Parse the document fileds (Planned deployment Date , Deployment Start Date , Deployment end date.) and update on the screen.