Confluence has been updated to version 6.15.9

This article provides details about the synchronization of Request participants field on Jira Server Service Desk, users will be match by email

Source side

Outgoing sync 

replica.customFields."Request participants" = issue.customFields."Request participants"


Destination side

Incoming sync

issue.customFields."Request participants"?.value = replica.customFields."Request participants"?.value?.collect { it ->
	nodeHelper.getUserByEmail(it?.email)  
}