LDAP Operations 8355,8248 and 8006 event ID's.

I have a few oddities in my Exchange server. All the issues seem to be related to contacting my Domain controllers. See below Event errors:

Event Type:      Information
Event Source:      MSExchangeAL
Event Category:      LDAP Operations
Event ID:      8355
Date:            11/06/2008
Time:            16:18:05
User:            N/A
Computer:      exchangeserver
Description:
The description for Event ID ( 8355 ) in Source ( MSExchangeAL ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: domaincontroller.domainname.uk.com, DC=domain,DC=uk,DC=com.


Event Type:      Information
Event Source:      MSExchangeAL
Event Category:      LDAP Operations
Event ID:      8248
Date:            11/06/2008
Time:            16:18:05
User:            N/A
Computer:      exchangeserver
Description:
LDAP notification search returned no results.  Return code [0x55] Timeout. DC=Domain,DC=uk,DC=com

For more information, click http://www.microsoft.com/contentredirect.asp.



Event Type:      Information
Event Source:      MSExchangeAL
Event Category:      LDAP Operations
Event ID:      8006
Date:            11/06/2008
Time:            16:18:05
User:            N/A
Computer:      exchangeserver
Description:
Opening LDAP session to directory domaincontroller.domain.uk.com on port 389. DC=domain,DC=uk,DC=com

For more information, click http://www.microsoft.com/contentredirect.asp.

I would appreciate any imput as how best to commence diagnosis of this. Many thanks for any advice.
fletcher_lAsked:
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rakeshmiglaniCommented:
these are all related to RUS (Recipient update service) and all are information events rather than warning or error
have you enabled diagnostic logging to MAX in the exchange server properties via ESM?
fletcher_lAuthor Commented:
Many thanks for pointing me in the right direction. I will as you have suggested crank up the logging and see what we get.
rakeshmiglaniCommented:
the events that you are getting are information events.
my question was "have you enabled diagnostic logging to MAX in the exchange server properties via ESM?"
if it is set to MAX, then you can set that to none so that these events don't come up.

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