Hi,

 We're trying to migrate and connect two instances of Jira servers (the new one is ours and older one with thousands of issues belongs to our contractor). Since we want to copy old issues, we first tried using bulk exalate, but it was taking about 10-15 seconds for each issue, then we tried export and import issues and connect them using connect option.

It worked almost fine and issues are now connected and in sync but we can't get it to sync old comments. we have enabled "Sync Back" and tried to initiate sync from both side but it never worked.