Is there any way to get the First Name and Last Name and such fields that show up in IdentityManager while using Membership Reboot as the user/claims store to come down via claims or some other method to be used in IDS clients? I have had to manually add claims for the first / last names (given_name and family_name). I do have the profile scope included in my application in both the IDS and client configuration. Authentication and everything else appears to be working nicely. Any help would be greatly appreciated.
Frankly, I haven't done this. But I would look into https://identityserver.github.io/Documentation/docsv2/advanced/userService.html GetProfileDataAsync method.
MR implementation is here(https://github.com/IdentityServer/IdentityServer3.MembershipReboot/blob/master/source/IdentityServer3.MembershipReboot/IdentityServer3.MembershipReboot.cs). You should be able to push FirstName and LastName properties as open-id claims inside GetProfileDataAsync method.