diff --git a/WebsitePanel/Sources/WebsitePanel.Providers.HostedSolution.Exchange2013/Exchange2013.cs b/WebsitePanel/Sources/WebsitePanel.Providers.HostedSolution.Exchange2013/Exchange2013.cs
index 730de2fa..95cf2a6f 100644
--- a/WebsitePanel/Sources/WebsitePanel.Providers.HostedSolution.Exchange2013/Exchange2013.cs
+++ b/WebsitePanel/Sources/WebsitePanel.Providers.HostedSolution.Exchange2013/Exchange2013.cs
@@ -2819,7 +2819,7 @@ namespace WebsitePanel.Providers.HostedSolution
                 Command cmd = new Command("Set-Mailbox");
                 cmd.Parameters.Add("Identity", accountName);
                 cmd.Parameters.Add("PrimarySmtpAddress", primaryEmail);
-                cmd.Parameters.Add("UserPrincipalName", primaryEmail);
+                //cmd.Parameters.Add("UserPrincipalName", primaryEmail);
                 cmd.Parameters.Add("WindowsEmailAddress", primaryEmail);
 
                 ExecuteShellCommand(runSpace, cmd);