diff --git a/src/Umbraco.Core/DependencyInjection/UmbracoBuilder.cs b/src/Umbraco.Core/DependencyInjection/UmbracoBuilder.cs
index 75b4bb4aec..84ade2837d 100644
--- a/src/Umbraco.Core/DependencyInjection/UmbracoBuilder.cs
+++ b/src/Umbraco.Core/DependencyInjection/UmbracoBuilder.cs
@@ -309,7 +309,6 @@ namespace Umbraco.Cms.Core.DependencyInjection
                 factory.GetRequiredService<IEventMessagesFactory>(),
                 factory.GetRequiredService<IExternalLoginWithKeyRepository>()
             ));
-            Services.AddUnique<IExternalLoginService>(factory => factory.GetRequiredService<ExternalLoginService>());
             Services.AddUnique<IExternalLoginWithKeyService>(factory => factory.GetRequiredService<ExternalLoginService>());
             Services.AddUnique<ILocalizedTextService>(factory => new LocalizedTextService(
                 factory.GetRequiredService<Lazy<LocalizedTextServiceFileSources>>(),
diff --git a/src/Umbraco.Core/Services/ExternalLoginService.cs b/src/Umbraco.Core/Services/ExternalLoginService.cs
index d934e89528..c290f3cd59 100644
--- a/src/Umbraco.Core/Services/ExternalLoginService.cs
+++ b/src/Umbraco.Core/Services/ExternalLoginService.cs
@@ -13,7 +13,7 @@ using Umbraco.Extensions;
 
 namespace Umbraco.Cms.Core.Services
 {
-    public class ExternalLoginService : RepositoryService, IExternalLoginService, IExternalLoginWithKeyService
+    public class ExternalLoginService : RepositoryService, IExternalLoginWithKeyService
     {
         private readonly IExternalLoginWithKeyRepository _externalLoginRepository;
 
diff --git a/src/Umbraco.Core/Services/IExternalLoginService.cs b/src/Umbraco.Core/Services/IExternalLoginService.cs
deleted file mode 100644
index 75f8069f0c..0000000000
--- a/src/Umbraco.Core/Services/IExternalLoginService.cs
+++ /dev/null
@@ -1,66 +0,0 @@
-using System;
-using System.Collections.Generic;
-using Umbraco.Cms.Core.Security;
-
-namespace Umbraco.Cms.Core.Services
-{
-    /// <summary>
-    /// Used to store the external login info
-    /// </summary>
-    [Obsolete("Use IExternalLoginServiceWithKey. This will be removed in Umbraco 10")]
-    public interface IExternalLoginService : IService
-    {
-        /// <summary>
-        /// Returns all user logins assigned
-        /// </summary>
-        /// <param name="userId"></param>
-        /// <returns></returns>
-        IEnumerable<IIdentityUserLogin> GetExternalLogins(int userId);
-
-        /// <summary>
-        /// Returns all user login tokens assigned
-        /// </summary>
-        /// <param name="userId"></param>
-        /// <returns></returns>
-        IEnumerable<IIdentityUserToken> GetExternalLoginTokens(int userId);
-
-        /// <summary>
-        /// Returns all logins matching the login info - generally there should only be one but in some cases
-        /// there might be more than one depending on if an administrator has been editing/removing members
-        /// </summary>
-        /// <param name="loginProvider"></param>
-        /// <param name="providerKey"></param>
-        /// <returns></returns>
-        IEnumerable<IIdentityUserLogin> Find(string loginProvider, string providerKey);
-
-        /// <summary>
-        /// Saves the external logins associated with the user
-        /// </summary>
-        /// <param name="userId">
-        /// The user associated with the logins
-        /// </param>
-        /// <param name="logins"></param>
-        /// <remarks>
-        /// This will replace all external login provider information for the user
-        /// </remarks>
-        void Save(int userId, IEnumerable<IExternalLogin> logins);
-
-        /// <summary>
-        /// Saves the external login tokens associated with the user
-        /// </summary>
-        /// <param name="userId">
-        /// The user associated with the tokens
-        /// </param>
-        /// <param name="tokens"></param>
-        /// <remarks>
-        /// This will replace all external login tokens for the user
-        /// </remarks>
-        void Save(int userId, IEnumerable<IExternalLoginToken> tokens);
-
-        /// <summary>
-        /// Deletes all user logins - normally used when a member is deleted
-        /// </summary>
-        /// <param name="userId"></param>
-        void DeleteUserLogins(int userId);
-    }
-}
diff --git a/src/Umbraco.Core/Services/ServiceContext.cs b/src/Umbraco.Core/Services/ServiceContext.cs
index 20774bd7a2..ea419f99f8 100644
--- a/src/Umbraco.Core/Services/ServiceContext.cs
+++ b/src/Umbraco.Core/Services/ServiceContext.cs
@@ -29,7 +29,7 @@ namespace Umbraco.Cms.Core.Services
         private readonly Lazy<IMemberTypeService>? _memberTypeService;
         private readonly Lazy<IMemberGroupService>? _memberGroupService;
         private readonly Lazy<INotificationService>? _notificationService;
-        private readonly Lazy<IExternalLoginService>? _externalLoginService;
+        private readonly Lazy<IExternalLoginWithKeyService>? _externalLoginService;
         private readonly Lazy<IRedirectUrlService>? _redirectUrlService;
         private readonly Lazy<IConsentService>? _consentService;
         private readonly Lazy<IKeyValueService>? _keyValueService;
@@ -38,7 +38,7 @@ namespace Umbraco.Cms.Core.Services
         /// <summary>
         /// Initializes a new instance of the <see cref="ServiceContext"/> class with lazy services.
         /// </summary>
-        public ServiceContext(Lazy<IPublicAccessService>? publicAccessService, Lazy<IDomainService>? domainService, Lazy<IAuditService>? auditService, Lazy<ILocalizedTextService>? localizedTextService, Lazy<ITagService>? tagService, Lazy<IContentService>? contentService, Lazy<IUserService>? userService, Lazy<IMemberService>? memberService, Lazy<IMediaService>? mediaService, Lazy<IContentTypeService>? contentTypeService, Lazy<IMediaTypeService>? mediaTypeService, Lazy<IDataTypeService>? dataTypeService, Lazy<IFileService>? fileService, Lazy<ILocalizationService>? localizationService, Lazy<IPackagingService>? packagingService, Lazy<IServerRegistrationService>? serverRegistrationService, Lazy<IEntityService>? entityService, Lazy<IRelationService>? relationService, Lazy<IMacroService>? macroService, Lazy<IMemberTypeService>? memberTypeService, Lazy<IMemberGroupService>? memberGroupService, Lazy<INotificationService>? notificationService, Lazy<IExternalLoginService>? externalLoginService, Lazy<IRedirectUrlService>? redirectUrlService, Lazy<IConsentService>? consentService, Lazy<IKeyValueService>? keyValueService, Lazy<IContentTypeBaseServiceProvider>? contentTypeBaseServiceProvider)
+        public ServiceContext(Lazy<IPublicAccessService>? publicAccessService, Lazy<IDomainService>? domainService, Lazy<IAuditService>? auditService, Lazy<ILocalizedTextService>? localizedTextService, Lazy<ITagService>? tagService, Lazy<IContentService>? contentService, Lazy<IUserService>? userService, Lazy<IMemberService>? memberService, Lazy<IMediaService>? mediaService, Lazy<IContentTypeService>? contentTypeService, Lazy<IMediaTypeService>? mediaTypeService, Lazy<IDataTypeService>? dataTypeService, Lazy<IFileService>? fileService, Lazy<ILocalizationService>? localizationService, Lazy<IPackagingService>? packagingService, Lazy<IServerRegistrationService>? serverRegistrationService, Lazy<IEntityService>? entityService, Lazy<IRelationService>? relationService, Lazy<IMacroService>? macroService, Lazy<IMemberTypeService>? memberTypeService, Lazy<IMemberGroupService>? memberGroupService, Lazy<INotificationService>? notificationService, Lazy<IExternalLoginWithKeyService>? externalLoginService, Lazy<IRedirectUrlService>? redirectUrlService, Lazy<IConsentService>? consentService, Lazy<IKeyValueService>? keyValueService, Lazy<IContentTypeBaseServiceProvider>? contentTypeBaseServiceProvider)
         {
             _publicAccessService = publicAccessService;
             _domainService = domainService;
@@ -97,7 +97,7 @@ namespace Umbraco.Cms.Core.Services
             IDomainService? domainService = null,
             IMacroService? macroService = null,
             IPublicAccessService? publicAccessService = null,
-            IExternalLoginService? externalLoginService = null,
+            IExternalLoginWithKeyService? externalLoginService = null,
             IServerRegistrationService? serverRegistrationService = null,
             IRedirectUrlService? redirectUrlService = null,
             IConsentService? consentService = null,
@@ -250,7 +250,7 @@ namespace Umbraco.Cms.Core.Services
         /// <summary>
         /// Gets the ExternalLoginService.
         /// </summary>
-        public IExternalLoginService? ExternalLoginService => _externalLoginService?.Value;
+        public IExternalLoginWithKeyService? ExternalLoginService => _externalLoginService?.Value;
 
         /// <summary>
         /// Gets the RedirectUrlService.
diff --git a/src/Umbraco.Infrastructure/Security/BackOfficeUserStore.cs b/src/Umbraco.Infrastructure/Security/BackOfficeUserStore.cs
index c91dda8890..284114dcd4 100644
--- a/src/Umbraco.Infrastructure/Security/BackOfficeUserStore.cs
+++ b/src/Umbraco.Infrastructure/Security/BackOfficeUserStore.cs
@@ -89,30 +89,6 @@ namespace Umbraco.Cms.Core.Security
 
         }
 
-        [Obsolete("Use non obsolete ctor")]
-        public BackOfficeUserStore(
-            ICoreScopeProvider scopeProvider,
-            IUserService userService,
-            IEntityService entityService,
-            IExternalLoginService externalLoginService,
-            IOptions<GlobalSettings> globalSettings,
-            IUmbracoMapper mapper,
-            BackOfficeErrorDescriber describer,
-            AppCaches appCaches)
-            : this(
-                scopeProvider,
-                userService,
-                entityService,
-                StaticServiceProvider.Instance.GetRequiredService<IExternalLoginWithKeyService>(),
-                StaticServiceProvider.Instance.GetRequiredService<IOptionsSnapshot<GlobalSettings>>(),
-                mapper,
-                describer,
-                appCaches,
-                StaticServiceProvider.Instance.GetRequiredService<ITwoFactorLoginService>())
-        {
-
-        }
-
         /// <inheritdoc />
         public override async Task<bool> GetTwoFactorEnabledAsync(BackOfficeIdentityUser user,
             CancellationToken cancellationToken = default(CancellationToken))
diff --git a/src/Umbraco.Infrastructure/Security/MemberUserStore.cs b/src/Umbraco.Infrastructure/Security/MemberUserStore.cs
index 87eb5f363e..7812075f8d 100644
--- a/src/Umbraco.Infrastructure/Security/MemberUserStore.cs
+++ b/src/Umbraco.Infrastructure/Security/MemberUserStore.cs
@@ -68,7 +68,7 @@ namespace Umbraco.Cms.Core.Security
             ICoreScopeProvider scopeProvider,
             IdentityErrorDescriber describer,
             IPublishedSnapshotAccessor publishedSnapshotAccessor,
-            IExternalLoginService externalLoginService)
+            IExternalLoginWithKeyService externalLoginService)
             : this(memberService, mapper, scopeProvider, describer, publishedSnapshotAccessor, StaticServiceProvider.Instance.GetRequiredService<IExternalLoginWithKeyService>(), StaticServiceProvider.Instance.GetRequiredService<ITwoFactorLoginService>())
         {