Office 365 (Outlook Client for Windows) - Set up a Mail Merge with Outlook Contacts
Your Outlook contact list can be the source of personalized information in a batch of Word documents, through Word's mail merge feature.
For the most current information on using Outlook contacts as a data source for a mail merge, please see the following Microsoft support article: https://support.office.com/en-us/article/Use-Outlook-contacts-as-a-data-source-for-a-mail-merge-4cfcf038-1bc4-4a73-b5e3-a3303302db13