Я использую этот код:
IIdentityManagementService idMana = (IIdentityManagementService)server.GetService(typeof(IIdentityManagementService));
TeamFoundationIdentity[][] projectIdentities1 = idMana.ReadIdentities(IdentitySearchFactor.DisplayName, new []{"dev"}, MembershipQuery.Expanded, ReadIdentityOptions.ExtendedProperties);
![I do not get its members, as highlighted in image](https://i.stack.imgur.com/C05WW.png)
![Azure DevOps Security tab (I would like to get this information)](https://i.stack.imgur.com/ZPkiB.png)