diff --git a/FluentEmail.Graph.Tests/GraphSenderTests.cs b/FluentEmail.Graph.Tests/GraphSenderTests.cs
index c550adff..c899e812 100644
--- a/FluentEmail.Graph.Tests/GraphSenderTests.cs
+++ b/FluentEmail.Graph.Tests/GraphSenderTests.cs
@@ -14,8 +14,7 @@ public class Tests
         const string tenantId = ""; //Add your AAD Tenant ID here
         const string graphSecret = ""; //Add your AAD Graph Client Secret here
         const string senderEmail = ""; //Add a sender email address from your Office 365 tenant
-        const string toEmail = "fluentEmail@mailinator.com";
-        const string toName = "FluentEmail Mailinator";
+        const string toEmail = "fluentemail@mailinator.com"; //change this if you like
         private bool saveSent = false;
 
         [SetUp]
@@ -50,7 +49,7 @@ public async Task CanSendEmailAsync()
             var email = Email
                 .From(senderEmail)
                 .To(toEmail)
-                .Subject("Test Email")
+                .Subject("Test Async Email")
                 .Body("Test email from Graph sender unit test");
 
             var response = await email.SendAsync();
@@ -76,7 +75,7 @@ public async Task CanSendEmailWithAttachments()
             var email = Email
                 .From(senderEmail)
                 .To(toEmail)
-                .Subject("Test Email")
+                .Subject("Test Email with Attachments")
                 .Body("Test email from Graph sender unit test")
                 .Attach(attachment);
 
@@ -90,7 +89,7 @@ public async Task CanSendHighPriorityEmail()
             var email = Email
                 .From(senderEmail)
                 .To(toEmail)
-                .Subject("Test Email")
+                .Subject("Test High Priority Email")
                 .Body("Test email from Graph sender unit test")
                 .HighPriority();
 
diff --git a/FluentEmail.Graph/GraphSender.cs b/FluentEmail.Graph/GraphSender.cs
index ca4503f3..1faa451b 100644
--- a/FluentEmail.Graph/GraphSender.cs
+++ b/FluentEmail.Graph/GraphSender.cs
@@ -7,6 +7,7 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 
@@ -120,6 +121,8 @@ public async Task<SendResponse> SendAsync(IFluentEmail email, CancellationToken?
 
             if(email.Data.Attachments != null && email.Data.Attachments.Count > 0)
             {
+                message.Attachments = new MessageAttachmentsCollectionPage();
+
                 email.Data.Attachments.ForEach(a =>
                 {
                     var attachment = new FileAttachment