Keep track of everyone you communicate with by creating and editing contacts in Outlook. Once you’ve saved someone as a contact, you can type the first few letters of their name into an email, and Outlook will fill in their email address for you. 

For more tips like this, check out the working remotely playlist at www.youtube.com/FoetronAcademy . Also, if you need any further assistance then you can raise a support ticket and get it addressed.