Hi Today, we had to restart the System Attendant service on Exchange 2007 Mailbox servers to fix an issue. Which brings the question, apart from the Information Store, are there any MS Exchange services on a 2007 box (mailbox, Hub, CAS) that would bring about an outage to users if I restarted the service? Sys Attendant didn't seem to cause a problem.

Microsoft Exchange Transport Log Search - restarting it should cause your users to notice that Microsoft Exchange Monitoring - restarting it should cause your users to notice that Microsoft Exchange IMAP4 - if you are not using IMAP of course Microsoft Exchange POP3 - if you re not using POP3 Microsoft Exchange Anti-spam Update - you can safely restart also that Microsoft Exchange Search Indexer - safe to restart With kind regards Krystian Zieja http://www.projectnenvision.com Follow me on twitter My Blog

For more info about the services check those two links below http://www.msexchange.org/articles-tutorials/exchange-server-2007/planning-architecture/how-exchange-server-2007-core-services-work-together.html http://exchangeserverinfo.com/2009/02/02/exchange-2007-services-and-its-functions-2.aspxJonas Andersson | Microsoft Community Contributor Award 2011 | MCITP: EMA 2007/2010 | Blog: http://www.testlabs.se/blog | Follow me on twitter: jonand82