http://blog.flaphead.dns2go.com/archive/2007/07/23/msexchangesa-9186.aspxThis is a good one. Both my Exchange 2003 and 2007 server are showing this event in the application event log Exchange 2003 shows this: Event Type: Warning Event Source: MSExchangeSA Event Category: General Event ID: 9186 Description: Microsoft ExchangeenCommunityServer 2.1 SP2 (Build: 61129.2)