Add Exchange Connection to existing mail application

We have an existing application written in VB.NET witch is already supporting sending email via SMTP and receiving email via imap and pop. We implemented the library MailBee for doing this work. Like MS-Outlook we also like the option to connect to MS Exchange server for reading incoming email and sending emails. The exchange server can be a server inside the LAN or connected over the internet. We accept to buy an additional library to connect and do the transport of emails to exchange-server. We're looking for a developer who already did this task and knows what to do. There are two options: a) Only consulting our developer, that we can do the coding. Maybe also sending some snippets. b) Directly do the coding with TeamViewer on our system Choose one option and the needed tools and libraries. If you apply for the task, please describe in witch project you already made experiences.