Can I restrict the share this issue function to include only users not random e-mail addresses?

[Nadine]

Hello everyone

Could someone please provide some information on the share-function in JIRA?

I have already found out that it is a system add-on which can be disabled and that users have to have the Browse Users permission to add other users. Also, it seems possible to disable e-mail addresses as input on the customer portal of service desk.

But I have a use case where issues should only be shared with users of the JIRA instance and not random e-mail addresses in JIRA Core so I am grateful for any information on this. 

[Rosa M Fossi]

Hi Nadine, were you able to find a solution for this?  I'm looking into something similar and ran across this post.

[Nadine]

Hi Rosa

Unfortunately, we do not have a solution to this yet... :(