Forum Discussion
Purview DLP Blocks Sharing Files with Specific Domains or Users
A new DLP rule is available to control sharing of SharePoint and OneDrive files with selected domains and email addresses. The new rule supports an allow list (permit sharing) and can also specify a ...
a) I can't provide support because I have no access to your tenant. Please file a support call with Microsoft to have them check things out.
b) It's possible that the necessary software bits have not yet reached your tenant.
c) As mentioned in the article, it can take several days before SharePoint synchronizes with DLP and makes the block effective.