Forum Discussion
Microsoft Teams tenant specific DLP
We are a defence company and have protective labels on our documents.
We have endpoint DLP to ensure that protectively marked documents are not uploaded to services that they shouldnt be.
We are now in a position where we can store these documents in our tenant but would like to block upload to 3rd party tenants.
URLs do not include the tenant name si we cant use URL filtering on our endpoint DLP or proxy.
Ive been told it can be done using CASB. Ive been looking at Microsoft Cloud defender as a CASB but am struggling to find out how to do it.
So questions:
1) Tenancy specific DLP. Is CASB the answer ?
2) If it is can microsoft cloud defender be used? (Forcepoint claim their CASB can yet Microsoft seems to score higher with Gartner)
3) if the answer to 1 and 2 is yes....can anyone sign post me on how to do it?
Can’t see any way of preventing that ”gap” other than configuring permissions in the label/labels.
*edit WillNunez just realized this should be possible by instead using Endpoint DLP policy.
7 Replies
- Wouldn't protecting said documents via a sensitivity label/RMS encryption be a better solution? You can define domain-based protection if needed, and you can integrate it with the DLP controls too.
- We use labels and resources is on the roadmap. However some labels have a classification which means they cannot be stored in cloud that hasn't been accredited
Endpoint dlp can prevent application and url level uploading. But with teams for example you can't differentiate between tenancies by url. I want to be able to block uploads of classified files at a tenancy level. I've been told casb by other vendors can do this. I'm trying to work out how it can be done with microsoft- You can use CA with a Conditional Access App Control session policy, connected to Microsoft Defender for Cloud Apps, with the session control type "Control file upload" and action "Block". There are many configuration options in there, such as scoping on sensitivity labels etc., and target "All company" for example.
Not sure you've seen the new setting in Endpoint DLP for devices where you can select a block of upload if a document isn't already labeled. Meaning no file can be uploaded until it's been labeled. Something to consider as well.
