Create a .csv: Log into CRM -> Select by tag/other indicator -> Export as Excel -> Open and edit -> Save as .csv
Open Outlook 2013
Create a folder/address book in Microsoft Outlook 2013: Lower left of navigation pane is … for Advanced -> Folders -> Contacts (This computer only) -> New Folder (right click) -> Rename (to rename) & Properties to define.
Import Contacts: File -> Open & Export -> Import / Export -> Import from another program or file -> Comma Separated Values -> Browse -> Options (pick about duplicates) -> Next (select a folder near the top, under Contacts -> Next -> Map Custom Fields -> (Click and drag if any missing) -> OK -> Finish.
Test: Create an email to test.