Hi, We are trying to programmtically build a MailItem object in a .NET program and trying to save it as a .msg file. The code works up to the point of the SaveAs call, where it hangs indefinitely. What could be the issue? Please see the code below. We have ensured that no other instance of Outlook.exe is running when we run our program. Outlook.Application OutlookApplication = new Outlook.Application(); Outlook.NameSpace olNamespace = OutlookApplication.GetNamespace("MAPI"); olNamespace.Logon(null, null, false, false); Outlook.MailItem newMail = (Outlook.MailItem)OutlookApplication.CreateItem(Outlook.OlItemType.olMailItem); newMail.To = "abc@xyz.com"; newMail.Subject = objEmailQueueLog.EmailTemplateSubject; newMail.Body = objEmailQueueLog.EmailTemplateBody; newMail.SaveAs(@"C:\aa.msg", Outlook.OlSaveAsType.olMSG); newMail = null; olNamespace.Logoff(); olNamespace = null; Thanks, Yash