Does Bot Framework store any data in Azure if I replace the default bot storage with my own custom storage?

I have a client that is very jealous about her data and she asked me to replace the default bot storage of my bot with a custom storage that saves all the data in an on-premises database.

First of all... is this something reasonable to do? (I mean in terms of effort, reliability, security, etc)? BTW, my bot is wrote in node-js.

Second, if I replace the storage, will the bot framework save permanently any conversation data in any other place (let's say, somewhere in Azure)? That's something my client would like to avoid for security concerns.

Thanks!

via Maxolidean