Is there a PowerShell cmdlet that will let me set the work hours for resources/rooms? thanks

Which Exchange version are you running?Martin Sundstrm | Microsoft Certified Trainer | MCITP: Enterprise Messaging Administrator | http://msundis.wordpress.com

Exchange 2007 sp1 Thanks

Ok, to set the actual work hours you have to use owa. Then you can configure the mailbox to only accept bookings during work hours in owa as well or with the following command: Set-MailboxCalendarSettings -Identity <mailboxidentity> -ScheduleOnlyDuringWorkHours $trueMartin Sundstrm | Microsoft Certified Trainer | MCITP: Enterprise Messaging Administrator | http://msundis.wordpress.com

Thought so, not very useful if you have over 300 meeting rooms.

Nope, not usefull at all. It's better in Exchange 2010, then you can change the settings using powershell... Martin Sundström | Microsoft Certified Trainer | MCITP: Enterprise Messaging Administrator | http://msundis.wordpress.com

Ok, to set the actual work hours you have to use owa. Then you can configure the mailbox to only accept bookings during work hours in owa as well or with the following command: Set-MailboxCalendarSettings -Identity <mailboxidentity> -ScheduleOnlyDuringWorkHours $true Martin Sundström | Microsoft Certified Trainer | MCITP: Enterprise Messaging Administrator | http://msundis.wordpress.com For Outlook client, the Working hours configuration is saved in following registry key on the client: HKCU\Software\Microsoft\Office\12.0\Outlook\Options\Calendar CalDefEnd CalDefStart For OWA client, the Working hours configuration is saved in a hide message in Calendar folder, you can use MFCMapi to check the configuration: 1. Run MFCMapi tool and logon the user mailbox (Online Mode) 2. Open mailbox and expand Root Container and Top of Information Store 3. Right click the Calendar folder and click Open Associated Contents Table 4. Click the message which subject is IPM.Configuration.WorkHours 5. Open the property 0x7C080102 which contains the Work Hours setting. According to Martin's advice, you also could make a script to bulk set the work hours the in PowerShell. ThanksYour expertise never fails to impress :)