Client has DLP Enforce and CloudSOC (CASB) for DAR (Securlet) policies.
DLP Enforce Policy with CASB response rule to label REST API One Drive files using MIP tagging is failing.
In CloudSOC Investigate and DLP Enforce seeing - Failed to tag filename XXXYYYZZZ.docx as "
Client changed the response rule in the DLP Enforce CloudSOC MPIP policy to this format:
{"labelName":"Confidential", "justificationText":"DLP_RESPONSE_ACTION"}
Test file then added to OneDrive was successfully remediated (tagged with desired label) via O365 Securlet
Note: O365 REST API processing takes time and subject to API performance factors.
Usually takes 15 to 30 min in a very small 25 User test lab to apply a tag