how to use cloud index in CES
what if you have indexed sources in your cloud and decided to switch to CES, can we use the index from the cloud ?
You can't. It is either one or the other.
Furthermore, I do not recommend switching from the Cloud to CES. The Cloud will be getting new features and much more, while CES won't. There are plenty of features that the Cloud has that CES lacks, ex: Coveo ML.