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Synchronization between two instances requires a configured Connection.

One side needs to initiate the connection and send an invitation to the partner (the Destination instance). 

The other side, depending on the Exalate version, needs to finish the configuration from their side. 

You can synchronize Servicenow incidents with different issue tracking systems like Jira(Cloud, Server or Data Center), GitHub, Zendesk or Hp ALM/QC. 

For more details check typical use cases

Start synchronization with your partner

To start synchronization with your partner - Initiate Connection

Have an Invitation code? 

If you have an Invitation code - Accept an Invitation.

Next step

Synchronize Servicenow incidents