Confluence has been updated to version 6.15.9

Exalate for JIRA server, data center and cloud can be installed and/or downloaded from the marketplace 

End of life policy (warning)

The exalate node software lifetime is explicitly capped to 2 years.  You will have to upgrade at least every 2 years to a more recent version. This is to ensure ongoing compatibility with future versions of the synchronisation software. 

Cloud versions are continuously upgraded.