Question
In File DLP, the internal/external determination may differ from what you expect.
Please explain how the determination works.
Answer
In File DLP, the internal/external determination is based on the domains registered with HENNGE.
If the determination for the target file is different from what you expect, please check whether the address of the file's sharer is registered with HENNGE.
Additionally, in the following cases, the determination may differ from your expectations.
Cases Where Files Shared Only Internally Are Determined as "External"
When Changing the Global Sharing Settings in Microsoft 365 / Google Workspace
File DLP determines whether external sharing has occurred based on the link sharing information of files and folders.
Therefore, even if you disable sharing links for the entire tenant after files or folders have been shared externally, File DLP will still determine them as "external."
In this case, since the tenant-wide settings take precedence, the files in question cannot actually be accessed from outside.
Changing the global sharing settings on the groupware side can cause this behavior regardless of whether it is before or after File DLP is implemented.
Please be aware of this when introducing File DLP to environments where sharing has previously been disabled, or when changing sharing scopes during operation.
Cases Where Files Shared Externally Are Determined as "Unknown"
If you are using "Target Audience" in Google Workspace, "Target Audience" is treated as a separate sharing scope called "Unknown-Target Audience," and internal/external determination cannot be made.
This is due to a limitation of the Google API, which cannot determine whether external accounts are included in the "Target Audience."
In the future, File DLP is considering adding a feature that allows customers to determine internal/external status for each "Target Audience."
Reference: About Target Audience (external site)
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