Apply a default sensitivity label to all documents in SharePoint/OneDrive

[Gurdev Singh]

I know about automatic labelling feature of Security and Compliance that scans SharePoint/OneDrive sites and automatically apply a label based on sensitive info detected. 

My question is about applying a default label i.e. "Is it possible to apply a default label to all documents in a site irrespective of any sensitive info"?

[#2]

@Gurdev Singh Hi, unfortunately, that is not possible as of yet.

There's some preview functionality available (https://docs.microsoft.com/en-us/microsoft-365/compliance/sensitivity-labels-teams-groups-sites + https://docs.microsoft.com/en-us/microsoft-365/compliance/sensitivity-labels-sharepoint-onedrive-fil...) but they don't work in such a way like old IRM in SharePoint did (=all existing documents were downloaded with RMS protection). The first preview behaves as access control (=conditonal access, no content ecryption or markings), the second one can apply default label to new documents you save directly to SharePoint (=not to existing documents).

[#3]

@Gurdev Singh 

When publishing the labels, in the policy setting, there is a choice to apply a particular label by default to all documents and emails. 

Personally I've not tried it but that looks like it should apply a label to everything.  Give the label a name like Internal.