Once a Cloud has been terminated can it be removed from the Clouds tab? If so how?
Richard
No, currently it can not be removed, see here for details.
In Cloud Manager 1.1, you can remove clouds that have either stopped successfully or are in a failed/inconsistent state.
See Can I remove stopped CQ clouds from the Clouds dashboard? at http://helpx.adobe.com/cloud-manager/using/faq.html for the steps.
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