Ara, The OS patches are not available through WSUS yet. You'll have to deploy them manually. May be Microsoft will make it available in WSUS sometime in March. HTH. Regards, Raj Periyasamy MCSE(Messaging), CCNA ________________________________ From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Ara Avvali Sent: Thursday, February 08, 2007 1:38 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: How to address daylight saving time by using the Exchange Calendar Update Tool Is it necessary doing this if both server and clients are fully patched with wsus? From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Michael B. Smith Sent: Thursday, February 08, 2007 5:36 AM To: exchange-2003@xxxxxxxxxxxxxxx; exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] How to address daylight saving time by using the Exchange Calendar Update Tool It's live: How to address daylight saving time by using the Exchange Calendar Update Tool http://support.microsoft.com/default.aspx?scid=kb;en-us;930879 And the tool: Exchange Calendar Update Tool http://www.microsoft.com/downloads/details.aspx?FamilyId=A9336886-4B28-4 010-9416-36D38429438D&displaylang=en