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This is a warning I get frequently. What is causing it?<br />
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Event Type: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Warning<br />
Event Source: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;MSExchangeIS Mailbox Store<br />
Event Category: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;General <br />
Event ID: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1025<br />
Date: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6/7/2010<br />
Time: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;10:11:54 AM<br />
User: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;N/A<br />
Computer: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;MAIL<br />
Description:<br />
An error occurred on database &quot;First Storage Group\Mailbox Database&quot;.<br />
&nbsp;Function name or description of problem: Restrict/SetSearchCriteria<wbr /><br />
Error: 1162 Warning: fail to apply search optimization to folder (FID 5-87403) &nbsp; Retrying without optimization. <br />
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For more information, see Help and Support Center at <a href="http://go.microsoft.com/fwlink/events.asp" rel="ugc">http://go.microsoft.com/fwlink/events.asp</a>.<br />

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This is a warning I get frequently. What is causing it?


Event Type:	Warning
Event Source:	MSExchangeIS Mailbox Store
Event Category:	General 
Event ID:	1025
Date:		6/7/2010
Time:		10:11:54 AM
User:		N/A
Computer:	MAIL
Description:
An error occurred on database "First Storage Group\Mailbox Database".
 Function name or description of problem: Restrict/SetSearchCriteria
Error: 1162 Warning: fail to apply search optimization to folder (FID 5-87403)   Retrying without optimization. 

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.


MSExchangeIS Mailbox Event ID 1025

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.