Article ID: 2498852 - View products that this article applies to.
Consider the following scenario. By default, Exchange Search is enabled for a mailbox database in a Microsoft Exchange Server 2007 environment. You use Microsoft Outlook in online mode to search a mailbox for a keyword or phrase that contains a single letter or a single digit. In this scenario, you receive the following error message even though there are matches for the keyword in the mailbox:
Additionally, the following event is logged in the Application log on the mailbox server:
No matches found for “keyword”.
Event ID : 1025
Category : None
Source : MSExchangeIS Mailbox Store
Type : Warning
Generated : <date>
Written : <date>
Machine : <computer>
Message : An error occurred on database "<storage group/mailbox database>".
Function name or description of problem: Content Indexing received an unusual and
unexpect error code from MSSearch
NOTE: 0x80041606 = QUERY_E_TOOCOMPLEX
This issue occurs because Exchange Search has a query restriction of 200,000 nodes. When a prefix search exceeds the query restriction, the search returns QUERY_E_TOOCOMPLEX. Therefore, 0x80041606 is logged as part of event ID 1025. By default, all searches that use Outlook online mode in an Exchange 2007 environment are prefix searches. If single digits or letters are used, this causes the system to search for all numbers or words that begin with the single digit or letter across the whole mailbox database. If the 200,000 nodes default limit is reached, the search returns the error.
Note The most common way to reach the 200,000 nodes limit is to search for a word or phrase that contains a single digit or letter. There are also other less common causes, such as entering very complex searches that have many AND, OR, and NOT operators. Additionally, complex combinations of date ranges and search terms, many entries in the To and From fields, or a combination of all these things may cause the limit to be reached.
To resolve this issue, install the following update rollup:
2608656Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/2608656/ )Description of Update Rollup 6 for Exchange Server 2007 Service Pack 3
322756After you install the update rollup, follow these steps to set the maximum number of query restriction nodes.
(https://support.microsoft.com/kb/322756/ )How to back up and restore the registry in Windows
Note We recommend a start value of 1,000,000 (decimal):
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about Exchange Search, visit the following Microsoft website:
General information about Exchange SearchFor more information about how to disable or enable Exchange Search, visit the following Microsoft website:
General information about how to disable or enable Exchange SearchFor more information, click the following article number to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/2616127/ )Event ID 9877 with error code "0x80041606" when you use Outlook in online mode to search for a keyword in Exchange Server 2010
Article ID: 2498852 - Last Review: October 30, 2012 - Revision: 3.0