@Alexis , I moved this from the Metallic section as I believe you are using the Core product.
Regarding the setting, here is what I found:
Enable Chaining for Replication
Certain Replication Pair combinations are not possible, or are only possible using different Replication Sets. You can enable chaining for replication to use destination paths as a source for replication pairs.
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From the CommCell Console ribbon, click Control Panel.
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On the Control Panel window, under the Data section, click Replication.
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On the Replication Settings dialog box, click the Enable chaining for Windows Continuous Data Replicator Agents check box and click OK.
https://documentation.commvault.com/11.26/expert/37434_replication_pair_configuration.html#enable-chaining-for-replication
This doesn’t elaborate too much, so let me know what needs clarification and I’ll get an answer as well as work with our docs team to update the text!