Hi,
What characteristics do these selected people have?
How do you create the mailmerge?
By using merge tags, we can create a unique link for each of your recipients In order to create this link, you'll need to create a field in your database and a matching field in your MailChimp account that contains a unique identifier for
each of your recipients.
Meanwhile, Please check your mailmerge steps as the following article:
http://office.microsoft.com/en-in/word-help/use-mail-merge-to-create-and-print-letters-and-other-documents-HA101857701.aspx
Karen Hu
TechNet Community Support
