You can synchronize with any of the supported issue tracking platforms.
For example, you can sync between your JIRA Cloud and JIRA Server, even if the JIRA server is in a private network and you cannot access it from the outside.
You can also sync local projects within the same Jira Instance. For more details check typical use cases.
Check the example integrations below:
2. Set up a Connection
Synchronization between two instances requires a Connection.
You can set up a connection from your side if you are an administrator in both instances.
If you don't have access to the remote instance you can set up only your side and send an invitation to your partner (the Destination instance administrator). The partner needs to finish the configuration.
To start synchronization with your partner - Initiate Connection v.4.
If you have an Invitation code - Accept an Invitation.
Go to an issue and use the Exalate button to start synchronization.
Configure the synchronization behavior of your use case with the help of Jira Cloud configuration guides.