After installing External Share for Jira you will be able to create links directly from any issue.
Create and view links
Options and settings when creating a new link
View existing links
Shared issue link display screen
Send by email
Shared issue links can be sent to anyone by email, and subject and email body can be customized.
The sent email contains information about the sender and details of shared link configuration:
A link to the shared issue
The expiration date and time (if given)
The password (if set)
