file1.csv

"DN","objectClass","homeMDB","name","displayName","mail","givenName","sAMAccountName","mailnickname","msExchHomeServerName","mDBUseDefaults"
"CN=%%k,OU=Users,OU=2013,OU=Secondary,OU=Students,OU=Users,OU=dn1,DC=dn2,DC=dn3,DC=dn4,DC=dn5","%%j","CN=2013","%%k","%%k","%%[email protected]","%%k","%%k","%%[email protected]","CN=InformationStore,CN=server1,CN=Servers,CN=First Administrative Group,CN=Administrative Groups,CN=shortAD,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=dn1,DC=dn2,DC=dn3,DC=dn4","TRUE"

file2
fn1sn1,fn1,sn1
fn1sn2,fn2,sn2
fn1sn3,fn3,sn3

file3
for /f "tokens=1,2,3 delims=, " %%i in (file1.csv) do csvde -i -k -f file2.csv -j .\ 

yow.el

(let ((inputs
       `(("[email protected]"   . "something else")
         ("[email protected]"     . "sam's other thing")
         ("[email protected]" . "mary's thang"))))
  (mapc (lambda (p)
          (let ((email (car p))
                (other (cdr p)))
            (insert (format "\"CN=%s,OU=Users,OU=2013,OU=Secondary,OU=Students,OU=Users,OU=dn1,DC=dn2,DC=dn3,DC=dn4,DC=dn5\",\"%s\",\"CN=2013\",\"%s\",\"%s\",\"%[email protected]\",\"%s\",\"%s\",\"%[email protected]\",\"CN=InformationStore,CN=server1,CN=Servers,CN=First Administrative Group,CN=Administrative Groups,CN=shortAD,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=dn1,DC=dn2,DC=dn3,DC=dn4\",\"TRUE\"\n"  email other email email email email email email))))
        inputs))