Microsoft Graph API : Some attributes are null when filtering by signInActivity/lastSignInDateTime
Hi. I have trouble retrieving the user's givenName and surname using Microsoft Graph API together with filtering using signInActivity/lastsignInDateTime. Here is the url I'm using: const graphUsersUrl = "https://graph.microsoft.com/V1.0/users?$top=999&$filter=signInActivity/lastSignInDateTime ge 2025-06-24T14:45:15Z and signInActivity/lastSignInDateTime le 2025-06-25T14:45:15Z&$select=id,givenName,surname,identities,signInActivity"; function mapUserEmails(userData: Array<any>) { return userData.map((userInstance) => { console.log(userInstance.givenName); return { userId: userInstance.id, givenName: userInstance.givenName, lastName: userInstance.surname, issuerAssignedId: userInstance.issuerAssignedId, userEmail: ( userInstance.identities as Array<{ signInType: string; issuerAssignedId: string; }> ).find((userIdentity) => userIdentity.signInType === "emailAddress") ?.issuerAssignedId, lastSignInDateTime: userInstance.signInActivity?.lastSignInDateTime, }; }); } In the returned result, the userId and lastSignInDateTime have values, but givenName and lastName are null. How can I get the values for givenName and surname? Any help is appreciated.