If you want to give a unique domain to a different partner or want to stop using a certain domain, you can revoke a partner's ability to use a unique domain.
From the left navigation bar, select Content → Unique Domains.
Under Actions, select
[Drop-down menu] → View Assigned Unique Domains.Find the unique domain you want to revoke partner use on.
Under Actions, select Revoke.
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Read the warning message, then select I understand, continue.
