Dear This is a strange request: Can I set using time for a part of email users, for example, just using from 8:30am to 5:30pm, other time cannot send/receive meail, but can check old email via OWA or Outlook. I just want to restrict email account with unaffected to login account, it means that users can login and use computer from 5:30pm to 8:30am. (I know how to set the account login time in AD, but don't how to set email account individually) P.S: I'm using Exchange2007 Verison:08.01.0340.000 thanks a lot.

You can create a transport rule to bounce the messages for these senders with customized NDR that explains the reason And then, you can disable the rule at 8:29 AM, enable the rule at 5:31 PM with PowerShell script and Schedule Task How To: Schedule PowerShell Script for an Exchange Task James Luo TechNet Subscriber Support (http://technet.microsoft.com/en-us/subscriptions/ms788697.aspx) If you have any feedback on our support, please contact tngfb@microsoft.com