how to add jira software user to my jira service desk?

Question

i have my service desk project with customer permission "Customers who have an account on this Jira site".
1.  I read that by this permission ,  Jira software users will be added to service desk (server)project automatically . But nothing happened like this..
2.  i tried to add jira software user to service desk project through
project settings > Users and roles. i couldn't even add the user as this is  showing user not found

So what should i do to add my jira software user to service desk project

Akhila K Saju · Answer

both are running on the same server

Nic Brough -Adaptavist- · Answer

Service Desk issues are only assigned to Service Desk Agents.  Software users can be invited to participate, but can't be assigned issues, as they're not the people dealing with them.

Andrew Laden · Answer

Are you software and service desk jira instances running on the same server? Or do you have 2 completely separate jira instances? (the user not found leads me to think they are completely seperate)