Hi,
I am Nallakumar. I have more than 8 years of experience in developing plugins for Outlook. Please have a look at my past projects here. I also have very good experience in LDAP connection, authentication and retrieve information from it.
I need a development environment from you end with Visual Studio 2012 or later or atleast a dedicated test machine for me for doing this work, as I don't have LDAP environment.
I can give you the first version in less than 2 days after you assign the work to me and the final deliverable the next day, after testing and bug fixing.
Thanks,
Nalla