Notification when an User logs into a vault

Login notifications: It’s unlikely that this can be achieved using the built-in notification configuration. You would probably need to create a custom extension (a vault application) to handle this functionality.

For example, the extension could:

• React to the AfterLoginToVault event.
• Check which user logged in.
• Call the SendCustomNotification method when the conditions are met.

Regarding file previews: previewing a file essentially involves downloading it to the client. From the server’s perspective, there’s no difference between previewing a file and opening it for editing or viewing in an external application. Both actions trigger a “File downloaded” event in the vault event log, unless the file is already found in the client cache. Further information in the support article Explanation for the "File downloaded" visible in M-Files Admin's Event Log.

Could you clarify what you want to accomplish with these notifications?