I am currently getting my email in Outlook via Army Knowledge Online. I have
added email addresses to my Personal Address Book, as well as my Contacts
list.

When I try to compose a new message, the Contacts list doesn't come up, just
the PAB. However, when I address a message to someone in the PAB, the
message will not be sent. I instantly get a message back that says the email
could not be sent because " None of your e-mail accounts could send to this
recipient."
What does this mean? How do I get the same listing of addresses in the PAB
and Contacts? And how can I send a message to someone in my PAB?