Hello I can confirm the issue is somewhat still here. I've been testing this call: https://graph.microsoft.com/beta/users?$select=displayName,userPrincipalName,signInActivity&top=999 To retrieve the signIn information but I can see it for random users only. I did a spot check and it looks like some of them are not showing any information when using the API call, but their signIn date is showing up when using the Azure AD portal. Example:
Is it again a temporary issue? This is ongoing at least since 3 weeks.