How to Automatically Index a Large Number of Documents in M-Files?

By "index" do you mean metadata extracted from the document and applied, yes?  Not full-text-indexed for searching or similar, but automated bulk metadata extraction and application?

Thank you for your response.
To clarify, what I mean is that the system should be able to recognize the data inside the document and automatically populate the corresponding metadata fields.
This is the type of automated indexing I’m referring to.
I appreciate your help and guidance.

This is one of the scenarios that "Aino metadata at scale" is looking to help with.  I need to connect with the appropriate product manager to get some more details for you, but what is the timeframe on this work?

Aino Metadata Agent at Scale is one of the topics covered in our Product Update Webinar in early December. Be sure to register to hear more!

If those documents are similar in structure and content you might be able to extract the relevant metadata using Regex. This can easily be done with the Extension Kit add-on. You can use a simple workflow to trigger the process or simply add or change a specific property as trigger or you can even run it as a Run Once operation.

You might also get some help from MF Intelligence services like M-Files Smart Metadata, M-Files Matcher or M-Files Text Analytics. However, they all only provide suggestions on individual documents, they can't set metadata directly, and they can't handle mass operations.
M-Files Smart Migration and Discovery are also options that might be worth looking into. Migration can help you import documents while adding some metadata, Discovery can set certain properties on existing documents in M-Files.

If those documents are similar in structure and content you might be able to extract the relevant metadata using Regex. This can easily be done with the Extension Kit add-on. You can use a simple workflow to trigger the process or simply add or change a specific property as trigger or you can even run it as a Run Once operation.

You might also get some help from MF Intelligence services like M-Files Smart Metadata, M-Files Matcher or M-Files Text Analytics. However, they all only provide suggestions on individual documents, they can't set metadata directly, and they can't handle mass operations.
M-Files Smart Migration and Discovery are also options that might be worth looking into. Migration can help you import documents while adding some metadata, Discovery can set certain properties on existing documents in M-Files.