Event ID : 8260

Issue : Cannot access Address List configuration information

Event Source : MSExchangeAL

Cause : The Recipient Update Service is configured to use a Windows domain controller that was demoted. When the Recipient Update Service tries to query the Windows domain controller for an update, it cannot contact it.
Note -This event can also be logged under normal conditions, when the Kerberos ticket for the server temporarily expires. This is especially likely when only one Windows global catalog server is available. Recovery from Kerberos ticket expiration typically occurs very quickly.

Description : Could not open LDAP session to directory ' ' using local service credentials. Cannot access Address List configuration information. Make sure the server ' ' is running.

Action Required : If you determine that the issue was caused by the demotion of a Windows domain controller, you can resolve this issue by following these steps:
1. Open Exchange System Manager.
2. Expand the Recipients container, and then click Recipient Update Services.
3. Double-click each Recipient Update Service, and then change the Windows domain controller setting to the new Windows domain controller in the domain.

Ref.Link : http://support.microsoft.com/kb/272552