Microsoft KB Archive/255787

= Exchange Discovery Takes a Long Time =

Article ID: 255787

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Metadirectory Services 2.1

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This article was previously published under Q255787



SYMPTOMS
In Microsoft Metadirectory Services (MMS), full discovery of a Microsoft Exchange site may take a long time.



CAUSE
There are two issues that influence the performance characteristics of an Exchange discovery:
 * When an Exchange Lightweight Directory Access Protocol (LDAP) discovery encounters distribution lists (DLs) in leaf nodes, the DLs may be dereferenced object by object.
 * Attempts to discover the Microsoft DMD and Configuration containers are unsuccessful and the time-outs introduce a significant delay.



RESOLUTION
To decrease the time it takes to perform a discovery, make the following changes: If the search is a single-level search:
 * 1) In the Action panel, click Configure the Management Agent.
 * 2) Click the Connected Directory Specifics tab.
 * 3) Click the Advanced tab.
 * 4) Click to clear the Consider person and list entries as non-leaf nodes check box.

If the search is a full tree search starting at the root:  In the Action panel, click Configure the Management Agent. Click the Connected Directory Specifics tab. Click the Advanced tab. Click the DNs to Exclude During the Discovery tab. Type the distinguished names (DNs) of the Exchange schema extensions objects.

Typically, these are:

cn=Microsoft DMD,ou= ,o=

and

cn=Configuration,ou= ,o=



Please note the following items:
 * The discovery of the Microsoft DMD (Microsoft Directory Management domain) container introduces the most significant delay.
 * The non-leaf setting for users and lists is only effective when you perform single-level searches.

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STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

Additional query words: Zoomit Via MA zscript genlogs

Keywords: kbenv kbprb KB255787

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