M-Files OCR Module

We have a client that's using Smart Classifier in their vault. However, we're noticing that a lot of documents are skipped for classification due to lacking a text layer. We were looking at options for OCR, and came across the OCR Module for M-Files. Reading the description of the module, it looks like the OCR module can be enabled for documents that are scanned into the vault. Does this include documents that are added to the vault via "drag n drop," and can this be an automatic conversion to a fully text-searchable pdf?  

or, are there other options for this kind of requirement?

Thank you