Hello Roland,
open an elevated cmd prompt and run

C:\Windows\system32\slmgr -dlv

Do this on your KMS host machine as well as a couple of the KMS client
machines.
What is the output? I removed the data from some of the lines. What is
the output of the rest of them
THe KMS Machine name entry was removed, but you need to verify that the
client machines are pointing to the correct KMS host machine.

Sample Output below:

Microsoft (R) Windows Script Host Version 5.7
Copyright (C) Microsoft Corporation. All rights reserved.

Software licensing service version: 6.0.6001.18000
Name: Windows(TM) Vista, Enterprise edition
Description: Windows Operating System - Vista, VOLUME_KMSCLIENT channel
Activation ID: <removed>
Application ID: <removed>
Extended PID: <removed>
Installation ID: <removed>
Partial Product Key: 4BWMV
License Status: Licensed
Volume activation expiration: 256560 minute(s) (178 day(s))

Key Management Service client information
Client Machine ID (CMID): <removed>
KMS machine name from DNS: DNS-Server_Name:1688
KMS machine extended PID:
Activation interval: 120 minutes
Renewal interval: 10080 minutes




Thanks,
Darrell Gorter[MSFT]

This posting is provided "AS IS" with no warranties, and confers no rights
--------------------
| >From: "Roland Serman" <roland.serman@vanderbilt.edu>
| >Subject: Windows 2008 KMS, not licensing Vista clients
| >Date: Mon, 12 May 2008 11:08:48 -0500
| >Lines: 1
| >MIME-Version: 1.0
| >Content-Type: text/plain;
| > format=flowed;
| > charset="iso-8859-1";
| > reply-type=original
| >Content-Transfer-Encoding: 7bit
| >X-Priority: 3
| >X-MSMail-Priority: Normal
| >Importance: Normal
| >X-Newsreader: Microsoft Windows Live Mail 12.0.1606
| >X-MimeOLE: Produced By Microsoft MimeOLE V12.0.1606
| >Message-ID: <e1qs3pEtIHA.1772@TK2MSFTNGP03.phx.gbl>
| >Newsgroups: microsoft.public.windows.server.setup
| >NNTP-Posting-Host: 129.59.96.214
| >Path: TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSF TNGP03.phx.gbl
| >Xref: TK2MSFTNGHUB02.phx.gbl microsoft.public.windows.server.setup:4253
| >X-Tomcat-NG: microsoft.public.windows.server.setup
| >
| > We recently switched from using a Vista client for our KMS server to a
| >Windows 2008 server. KMS is setup, and the appropriate DNS SRV records
have
| >been updated. Unfortunately it doesn't appear to have actually licensed
any
| >of the clients yet.
| >
| >Key Management Service is enabled on this machine
| > Current count: 3
| > Listening on Port: XXXX
| > DNS publishing disabled
| > KMS priority: Normal
| >
| >Key Management Service cumulative requests received from clients
| > Total requests received: 113
| > Failed requests received: 0
| > Requests with License Status Unlicensed: 0
| > Requests with License Status Licensed: 0
| > Requests with License Status Initial grace period: 113
| > Requests with License Status License expired or Hardware out of
| >tolerance: 0
| >
| > Requests with License Status Non-genuine grace period: 0
| > Requests with License Status Notification: 0
| >
| >Not sure why after receiving 113 requests it has a current count of 3,
and 0
| >for 'Status Licensed'.
| >
| >If anyone can provide some guidance on this I would greatly appreciate
it.
| >
| >Roland
| >
| >