Consider the following scenario:
- You have a large Microsoft Exchange Server 2010 environment.
- One or more public folder servers go down.
In this scenario, the Exchange server generates too many concurrent Active Directory queries to discover alternative public folder servers for the Microsoft Outlook client and each public logon. Then, the Exchange server loses its connection to the domain controllers because the network send queue of Lightweight Directory Access Protocol (LDAP) servers is full.
Additionally, the following event is visible in the Application log in Event Viewer:
ID: 2070
Level: Information
Source: MSExchange ADAccess
Machine: Machine_Name
Message: Process Microsoft.Exchange.RpcClientAccess.Service.exe (PID=32892). Exchange Active Directory Provider lost contact with domain controller Domain_controller. Error was 0x33 (Busy) (Additional information: The LDAP servers network send queue has filled up because the client is not processing the results of it's requests fast enough. No more requests will be processed until the client catches up. If the client does not catch up then it will be disconnected.
Active directory response: 000021A8: LdapErr: DSID-0C06056F, comment: The server is sending data faster than the client has been receiving. Subsequent requests will fail until the client catches up, data 0, v1db1). Exchange Active Directory Provider will attempt to reconnect with this domain controller when it is reachable.
This issue occurs because lots of Active Directory queries are generated by the Exchange server for the public folder topology when one of the public folder servers goes down.
To resolve this issue, install
Update Rollup 8 for Exchange Server 2010 Service Pack 3
(http://support.microsoft.com/kb/2986475)
.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See
Terms of Use
(http://go.microsoft.com/fwlink/?LinkId=151500)
for other considerations.
Article ID: 3004521 - Last Review: December 9, 2014 - Revision: 1.0
Applies to
- Microsoft Exchange Server 2010 Service Pack 3, when used with:
- Microsoft Exchange Server 2010 Enterprise
- Microsoft Exchange Server 2010 Standard
| kbqfe kbfix kbsurveynew kbexpertiseinter KB3004521 |
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