Google Drive Team Drive权限返回空emailAddress是否为正确行为？

Great question! Let me break this down clearly for you:

Yes, returning an empty emailAddress for a user who was previously suspended (and is now active) is expected and correct behavior when using the Google Drive API for Team Drives.

Here's the reasoning behind this:

• When a Google Workspace (or Google Account) user is suspended by an administrator, Google’s systems restrict access to their personal identifying information—including their email address—in Drive API permission responses. This aligns with privacy and security policies to prevent exposure of user data for accounts that aren’t active at the time of the API call.
• Even after the user is reactivated, the existing permission record in the Team Drive doesn’t automatically update to populate the emailAddress field. The API doesn’t retroactively modify historical permission entries; the empty value persists unless the permission is explicitly refreshed or reconfigured (like re-adding the user to the Team Drive, though this isn’t necessary since their access is already restored).
• You’re already using the useDomainAdminAccess=true parameter, which grants the highest level of access to retrieve permission details. The fact that the emailAddress is still empty confirms this is an intentional API design choice, not a bug or permission oversight.

If you need to verify the user’s identity, you can cross-reference the permission entry with your organization’s user directory (via tools like the Google Workspace Admin API) using other identifiers, or you can choose to re-apply the permission to the user—this would trigger an update to the permission record, and the emailAddress should appear in subsequent API responses.

内容的提问来源于stack exchange，提问作者Roman Slivinskyi