diff --git a/SDK/AppCenter/Microsoft.AppCenter.Shared/AppCenter.cs b/SDK/AppCenter/Microsoft.AppCenter.Shared/AppCenter.cs
index 6f94e5ad2..48ccaee30 100644
--- a/SDK/AppCenter/Microsoft.AppCenter.Shared/AppCenter.cs
+++ b/SDK/AppCenter/Microsoft.AppCenter.Shared/AppCenter.cs
@@ -60,24 +60,14 @@ namespace Microsoft.AppCenter
         /// </summary>
         public static LogLevel LogLevel
         {
-            get
-            {
-                return PlatformLogLevel;
-            }
-
-            set
-            {
-                PlatformLogLevel = value;
-            }
+            get => PlatformLogLevel;
+            set => PlatformLogLevel = value;
         }
 
         /// <summary>
         /// Get the current version of AppCenter SDK.
         /// </summary>
-        public static string SdkVersion
-        {
-            get { return WrapperSdk.Version; }
-        }
+        public static string SdkVersion => WrapperSdk.Version;
 
         /// <summary>
         /// Check whether the SDK is enabled or not as a whole.
diff --git a/SDK/AppCenter/Microsoft.AppCenter.Windows.Shared/AppCenter.cs b/SDK/AppCenter/Microsoft.AppCenter.Windows.Shared/AppCenter.cs
index 28620f906..8d57a92ff 100644
--- a/SDK/AppCenter/Microsoft.AppCenter.Windows.Shared/AppCenter.cs
+++ b/SDK/AppCenter/Microsoft.AppCenter.Windows.Shared/AppCenter.cs
@@ -37,6 +37,7 @@ namespace Microsoft.AppCenter
         private IChannelGroup _channelGroup;
         private IChannelUnit _channel;
         private readonly HashSet<IAppCenterService> _services = new HashSet<IAppCenterService>();
+        private List<string> _startedServiceNames;
         private string _logUrl;
         private bool _instanceConfigured;
         private string _appSecret;
@@ -124,8 +125,7 @@ namespace Microsoft.AppCenter
         {
             lock (AppCenterLock)
             {
-                Instance.InstanceEnabled = enabled;
-                return Task.FromResult(default(object));
+                return Instance.SetInstanceEnabled(enabled);
             }
         }
 
@@ -261,34 +261,39 @@ namespace Microsoft.AppCenter
         internal IApplicationSettings ApplicationSettings => _applicationSettings;
         internal INetworkStateAdapter NetworkStateAdapter => _networkStateAdapter;
 
-        private bool InstanceEnabled
+        private bool InstanceEnabled => _applicationSettings.GetValue(EnabledKey, true);
+
+        // That method isn't async itself but can return async task from the channel for awaiting log enqueue.
+        private Task SetInstanceEnabled(bool value)
         {
-            get
+            var enabledTerm = value ? "enabled" : "disabled";
+            if (InstanceEnabled == value)
             {
-                return _applicationSettings.GetValue(EnabledKey, true);
+                AppCenterLog.Info(AppCenterLog.LogTag, $"App Center has already been {enabledTerm}.");
+                return Task.FromResult(default(object));
             }
-            set
+
+            // Update channels state.
+            _channelGroup?.SetEnabled(value);
+
+            // Store state in the application settings.
+            _applicationSettings.SetValue(EnabledKey, value);
+
+            // Apply change to services.
+            foreach (var service in _services)
             {
-                var enabledTerm = value ? "enabled" : "disabled";
-                if (InstanceEnabled == value)
-                {
-                    AppCenterLog.Info(AppCenterLog.LogTag, $"App Center has already been {enabledTerm}.");
-                    return;
-                }
-
-                // Update channels state.
-                _channelGroup?.SetEnabled(value);
-
-                // Store state in the application settings.
-                _applicationSettings.SetValue(EnabledKey, value);
-
-                // Apply change to services.
-                foreach (var service in _services)
-                {
-                    service.InstanceEnabled = value;
-                }
-                AppCenterLog.Info(AppCenterLog.LogTag, $"App Center has been {enabledTerm}.");
+                service.InstanceEnabled = value;
             }
+            AppCenterLog.Info(AppCenterLog.LogTag, $"App Center has been {enabledTerm}.");
+
+            // Send started services.
+            if (_startedServiceNames != null && value)
+            {
+                var startServiceLog = new StartServiceLog { Services = _startedServiceNames };
+                _startedServiceNames = null;
+                return _channel.EnqueueAsync(startServiceLog);
+            }
+            return Task.FromResult(default(object));
         }
 
         private void SetInstanceLogUrl(string logUrl)
@@ -309,9 +314,7 @@ namespace Microsoft.AppCenter
                 AppCenterLog.Error(AppCenterLog.LogTag, "Custom properties may not be null or empty");
                 return;
             }
-            var customPropertiesLog = new CustomPropertyLog();
-            customPropertiesLog.Properties = customProperties.Properties;
-            _channel.EnqueueAsync(customPropertiesLog);
+            _channel.EnqueueAsync(new CustomPropertyLog { Properties = customProperties.Properties });
         }
 
         private void OnUnhandledExceptionOccurred(object sender, UnhandledExceptionOccurredEventArgs args)
@@ -362,7 +365,7 @@ namespace Microsoft.AppCenter
                 throw new AppCenterException("App Center has not been configured.");
             }
 
-            var startServiceLog = new StartServiceLog();
+            var serviceNames = new List<string>();
             foreach (var serviceType in services)
             {
                 if (serviceType == null)
@@ -385,7 +388,7 @@ namespace Microsoft.AppCenter
                             throw new AppCenterException("Service type does not contain static 'Instance' property of type IAppCenterService");
                         }
                         StartService(serviceInstance);
-                        startServiceLog.Services.Add(serviceInstance.ServiceName);
+                        serviceNames.Add(serviceInstance.ServiceName);
                     }
                 }
                 catch (AppCenterException e)
@@ -395,9 +398,20 @@ namespace Microsoft.AppCenter
             }
 
             // Enqueue a log indicating which services have been initialized
-            if (startServiceLog.Services.Count > 0)
+            if (serviceNames.Count > 0)
             {
-                _channel.EnqueueAsync(startServiceLog);
+                if (InstanceEnabled)
+                {
+                    _channel.EnqueueAsync(new StartServiceLog { Services = serviceNames });
+                }
+                else
+                {
+                    if (_startedServiceNames == null)
+                    {
+                        _startedServiceNames = new List<string>();
+                    }
+                    _startedServiceNames.AddRange(serviceNames);
+                }
             }
         }
 
diff --git a/SDK/AppCenter/Microsoft.AppCenter.Windows.Shared/Ingestion/Models/StartServiceLog.cs b/SDK/AppCenter/Microsoft.AppCenter.Windows.Shared/Ingestion/Models/StartServiceLog.cs
index 89bf50f3a..232e44249 100644
--- a/SDK/AppCenter/Microsoft.AppCenter.Windows.Shared/Ingestion/Models/StartServiceLog.cs
+++ b/SDK/AppCenter/Microsoft.AppCenter.Windows.Shared/Ingestion/Models/StartServiceLog.cs
@@ -36,7 +36,7 @@ namespace Microsoft.AppCenter.Ingestion.Models
         /// </param>
         /// <param name="services">The list of services of the MobileCenter
         /// Start API call.</param>
-        public StartServiceLog(Device device, System.DateTime? timestamp = default(System.DateTime?), System.Guid? sid = default(System.Guid?), IList<string> services = default(IList<string>))
+        public StartServiceLog(Device device, DateTime? timestamp = default(DateTime?), Guid? sid = default(Guid?), IList<string> services = default(IList<string>))
             : base(device, timestamp, sid)
         {
             Services = services;
diff --git a/Tests/Microsoft.AppCenter.Test.Windows/AppCenterTest.cs b/Tests/Microsoft.AppCenter.Test.Windows/AppCenterTest.cs
index cdc6b6ab1..9d8a20b36 100644
--- a/Tests/Microsoft.AppCenter.Test.Windows/AppCenterTest.cs
+++ b/Tests/Microsoft.AppCenter.Test.Windows/AppCenterTest.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Threading.Tasks;
 using Microsoft.AppCenter.Channel;
 using Microsoft.AppCenter.Ingestion.Models;
 using Microsoft.AppCenter.Test.Channel;
@@ -529,33 +530,68 @@ namespace Microsoft.AppCenter.Test
         {
             _settingsMock.Setup(settings => settings.GetValue(AppCenter.EnabledKey, It.IsAny<bool>()))
                 .Returns(true);
-            var channelUnitMock = new Mock<IChannelUnit>();
-            _channelGroupMock.Setup(
-                    group => group.AddChannel(It.IsAny<string>(), It.IsAny<int>(), It.IsAny<TimeSpan>(), It.IsAny<int>()))
-                .Returns(channelUnitMock.Object);
 
             // Set before App Center is configured.
             AppCenter.SetCustomProperties(new CustomProperties());
-            channelUnitMock.Verify(channel => channel.EnqueueAsync(It.IsAny<Log>()), Times.Never());
+            _channelMock.Verify(channel => channel.EnqueueAsync(It.IsAny<Log>()), Times.Never());
 
             AppCenter.Configure("appsecret");
 
             // Set null.
             AppCenter.SetCustomProperties(null);
-            channelUnitMock.Verify(channel => channel.EnqueueAsync(It.IsAny<Log>()), Times.Never());
+            _channelMock.Verify(channel => channel.EnqueueAsync(It.IsAny<Log>()), Times.Never());
 
             // Set empty.
             var empty = new CustomProperties();
             AppCenter.SetCustomProperties(empty);
-            channelUnitMock.Verify(channel => channel.EnqueueAsync(It.IsAny<Log>()), Times.Never());
+            _channelMock.Verify(channel => channel.EnqueueAsync(It.IsAny<Log>()), Times.Never());
 
             // Set normal.
             var properties = new CustomProperties();
             properties.Set("test", "test");
             AppCenter.SetCustomProperties(properties);
-            channelUnitMock.Verify(channel => channel.EnqueueAsync(It.Is<CustomPropertyLog>(log =>
+            _channelMock.Verify(channel => channel.EnqueueAsync(It.Is<CustomPropertyLog>(log =>
                 log.Properties == properties.Properties)), Times.Once());
         }
+
+        /// <summary>
+        /// Verify sending start service log
+        /// </summary>
+        [TestMethod]
+        public void SendStartServices()
+        {
+            _settingsMock.Setup(settings => settings.GetValue(AppCenter.EnabledKey, It.IsAny<bool>()))
+                .Returns(true);
+
+            AppCenter.Start("appsecret", typeof(MockAppCenterService));
+
+            Task.Delay(100).Wait();
+
+            _channelMock.Verify(channel => channel.EnqueueAsync(It.Is<StartServiceLog>(log =>
+                log.Services.Count == 1 &&
+                log.Services[0] == MockAppCenterService.Instance.ServiceName)), Times.Once());
+        }
+
+        /// <summary>
+        /// Verify sending start services log after enable
+        /// </summary>
+        [TestMethod]
+        public void SendStartServicesAfterEnable()
+        {
+            _settingsMock.Setup(settings => settings.GetValue(AppCenter.EnabledKey, It.IsAny<bool>()))
+                .Returns(false);
+
+            AppCenter.Start("appsecret", typeof(MockAppCenterService));
+            Task.Delay(100).Wait();
+            _channelMock.Verify(channel => channel.EnqueueAsync(It.IsAny<StartServiceLog>()), Times.Never());
+
+            _settingsMock.SetupSequence(settings => settings.GetValue(AppCenter.EnabledKey, It.IsAny<bool>()))
+                .Returns(false).Returns(true);
+            AppCenter.SetEnabledAsync(true).RunNotAsync();
+            _channelMock.Verify(channel => channel.EnqueueAsync(It.Is<StartServiceLog>(log =>
+                log.Services.Count == 1 &&
+                log.Services[0] == MockAppCenterService.Instance.ServiceName)), Times.Once());
+        }
     }
 
     public class NullInstanceAppCenterService : IAppCenterService