i'm need to block a specific file format in a library of sharepoint online site (o365). I have activated RMS feature in admin & in Admin-> sharepoint-> settings too. what's the next step or procedure?

Or is there a feature or method where I can allow the users to add only documents or Pdf file format ?

I'm need to block a specific file format in a library of SharePoint online site (o365). I have activated RMS feature in admin & in Admin-> sharepoint-> settings too.

What's the next step or procedure?

Or is there a feature or method where I can allow the users to add only documents or Pdf file format ?

I need to block a specific file format in a library of sharepoint online site (o365). I have activated RMS feature in admin & in Admin-> sharepoint-> settings too.

What's the next step or procedure?

i'm need to block a specific file format in a library of sharepoint online site (o365). I have activated RMS feature in admin & in Admin-> sharepoint-> settings too. what's the next step or procedure?

Or is there a feature or method where I can allow the users to add only documents or Pdf file format ?

i'm need to block a specific file format in a library of sharepoint online site (o365). I have activated RMS feature in admin & in Admin-> sharepoint-> settings too. what's the next step or procedure?

I need to block a specific file format in a library of sharepoint online site (o365). I have activated RMS feature in admin & in Admin-> sharepoint-> settings too.

What's the next step or procedure?