This article was previously published under Q271960
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When you use the Check Names option in an e-mail client to verify a recipient's name, Exchange Server searches the appropriate address list and returns the correct name, but the search may take longer than expected. In particular, if Exchange Server performs the same search multiple times, subsequent searches may take as long as the first search. Because Exchange Server caches the search criteria used during an address list search, you expect subsequent searches to take less time than the first.
This issue occurs when the information store is unable to determine that the current search criteria has already been cached by the Exchange Server database engine because the Exchange Server database engine has not sorted the index in the manner that the information store expects.
To resolve this problem, obtain the latest service pack for Exchange Server 5.5. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
191914 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack
The following files are available for download from the MicrosoftDownload Center:
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.
Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 4.