Aspose.Email for .NET provides a large set of capabilities to manipulate MS Outlook as well as other popular message formats. It also provides vast variety of support for communication protocols such as POP3, IMAP, SMTP and Exchange Server protocols i.e. WebDav and Exchange Web Service (EWS). However, there are certain limitations or known issues as well that must be kept in mind while using the API. At present, the API supports converting OST formats to PST except OST 2013/2016.