Merge pull request #7823 from MicrosoftDocs/lucciz01-improve-error-while-sending-the-email-message

AB#3015: Reorganize/move/improve articles - error-while-sending-the-email-message

Author: lucciz01

support/power-platform/dataverse/email-exchange-synchronization/error-while-sending-the-email-message.md

@@ -1,12 +1,11 @@
 ---
-title: Error while sending the email message
-description: Provides a solution to an error that occurs when you test and enable a mailbox.
+title: An unknown error occurred while sending the email message
+description: Provides a solution to an error that occurs when you test and enable a mailbox in Microsoft Dynamics 365.
 ms.reviewer: 
-ms.topic: troubleshooting
-ms.date: 11/19/2024
+ms.date: 12/30/2024
 ms.custom: sap:Email and Exchange Synchronization
 ---
-# An unknown error occurred while sending the email message error appears when testing and enabling a mailbox in Microsoft Dynamics 365
+# "An unknown error occurred while sending the email message" when testing a mailbox in Dynamics 365
 
 This article provides a solution to an error that occurs when you try to test and enable a mailbox in Microsoft Dynamics 365.
 
@@ -15,37 +14,40 @@ _Original KB number:_   4092733
 
 ## Symptoms
 
-When you attempt to test and enable a mailbox in Microsoft Dynamics 365, you receive the following error:
+When you try to [test and enable a mailbox](/power-platform/admin/connect-exchange-online#test-the-configuration-of-mailboxes) in Microsoft Dynamics 365, you receive the following error:
 
-> "An unknown error occurred while sending the email message "Your mailbox is now connected to Dynamics 365". Mailbox \<Mailbox Name> didn't synchronize. The owner of the associated email server profile \<Profile Name> has been notified."
+> An unknown error occurred while sending the email message "Your mailbox is now connected to Dynamics 365". Mailbox \<Mailbox Name> didn't synchronize. The owner of the associated email server profile \<Profile Name> has been notified.
 
-If you select the **Details** section, you may also see more details such as the following text:
+If you select the **Details** section, you might find the following details:
 
-> "Error : System.Net.Mail.SmtpException: Syntax error, command unrecognized. The server response was:  
-   at System.Net.Mail.SmtpConnection.ConnectAndHandshakeAsyncResult.End(IAsyncResult result)  
-   at System.Net.Mail.SmtpTransport.EndGetConnection(IAsyncResult result)  
-   at System.Net.Mail.SmtpClient.ConnectCallback(IAsyncResult result)"
+> Error : System.Net.Mail.SmtpException: Syntax error, command unrecognized. The server response was:  
+> at System.Net.Mail.SmtpConnection.ConnectAndHandshakeAsyncResult.End(IAsyncResult result)  
+> at System.Net.Mail.SmtpTransport.EndGetConnection(IAsyncResult result)  
+> at System.Net.Mail.SmtpClient.ConnectCallback(IAsyncResult result)
 
 ## Cause
 
-This error can occur if the Outgoing Port value within the Advanced section of the email server profile isn't correct.
+This error can occur if the **Outgoing Port** value in the **Advanced** section of the email server profile isn't correct.
 
 ## Resolution
 
 To fix this issue, follow these steps:
 
-1. Navigate to **Settings**, **Email Configuration**, and then select **Email Server Profiles**.
-2. Open the Email Server Profile that is used by the mailbox meeting this error.
+1. Sign in to your Dynamics 365 organization with a user account that has the "System Administrator" role.
+1. Navigate to **Settings** > **Email Configuration**, and then select **Email Server Profiles**.
+
+1. Open the email server profile that's used by the mailbox receiving this error.
 
     > [!NOTE]
-    > You can also select the name of the Email Server Profile within the error message. It appears as a hyperlink which will open the correct Email Server Profile record.
+    > You can also select the name of the email server profile in the error message. It appears as a hyperlink that will open the correct email server profile record.
 
-3. Select **Advanced**.
-4. Correct the **Outgoing Port** value and then select **Save**.
+1. Select **Advanced**.
+1. Correct the **Outgoing Port** value and then select **Save**.
 
     > [!NOTE]
-    > Refer to the documentation from your email provider for the correct ports to use when connecting to the SMTP service. For [Gmail](https://support.google.com/mail/answer/7104828) the port is 587.
+    > Refer to the documentation from your email provider for the correct ports when connecting to the SMTP service. For example, for [Gmail](https://support.google.com/mail/answer/7104828), use port 587 for TLS/STARTTLS connections.
+
+1. Select **Mailboxes**, and then select the mailbox that received the error.
+1. Select the **Test & Enable Mailboxes** button.
 
-5. Select **Mailboxes** and then select the mailbox that received the error.
-6. Select the **Test & Enable Mailboxes** button.
-7. After the tests complete, open the mailbox record and view the **Alerts** section if the results don't appear as Success.
+1. After the test is complete, open the mailbox record and view the **Alerts** section if the results don't appear as **Success**.