Active directory

I am having DC's in separate sites .

some servers are complaining  of high LDAP query which is taking too long

IT technician who are working are complaining of windows update ON ANOTHER DC's which are replicating.

I need to know to know how windows update , relay queue, back up  on exchange relay server can cause high LDAP QUERY,
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Will SzymkowskiSenior Solution ArchitectCommented:
Where you are seeing these events? You posted a question like this the other day? ,no? Can you provide the event on what server you are getting this from. Also what does your current AD Sites structure look like?

Seth SimmonsSr. Systems AdministratorCommented:
this is the third question you have posted about these AD/Exchange issues
please add the attachment from your second thread to the first one in order to keep all the details in one place instead of opening additional questions with only parts of the issue
pramod1Author Commented:
please see the attachment and my answer

there are lot of ad sites all across usa and Europe having windows server 2008 and 2012
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pramod1Author Commented:
my answers which my director mentioned is more based on TechNet rather than

real solution
pramod1Author Commented:
pramod1Author Commented:
I needed to find the root cause analysis
Thomas GrassiSystems AdministratorCommented:
I found this that may help you understand


Also we need to see which event ID error you are receiving post the event error please
David Johnson, CD, MVPOwnerCommented:
IT technician who are working are complaining of windows update ON ANOTHER DC's which are replicating. what is the exact complaint?  Cannot reach Windows Update? Machines not auto-updating? WHAT?
pramod1Author Commented:
we have lot windows 2008 and 2012 servers dispersed across Europe site.

there is site link and each site has its own bridgehead server they are all replicating as per their AD site and services.

No.1 my question was I told to find the root cause of  high LDAP query , some L1 engineers who have worked cited reasons like windows update or back up , or relay queue length was high on some servers so high Ldap query got generated - my questions is how they trigger high ldap query?

No.2-one or more objects pointing to AD deleted objects-what is the root cause for this to happen
David Johnson, CD, MVPOwnerCommented:
No.2-one or more objects pointing to AD deleted objects-what is the root cause for this to happen replication issues ... in fact most of your problems are replication issues
AmitIT ArchitectCommented:
Enable net logon logging and field engineering logs
pramod1Author Commented:

enable net logon logging and field engineering logs -you are referring to which incident

I would appreciate your reply
pramod1Author Commented:
my question still is how windows update , or back up on a particular server can cause high LDAP

pramod1Author Commented:
can some body tell me exactly what is the exact meaning of "High LDAP Search Time detected. Sustained for 2 minutes - Yellow(>100 milliseconds)."
Seth SimmonsSr. Systems AdministratorCommented:
an ldap search shouldn't take long; it is telling you it is taking too long (2 minutes)
windows update has no reason to do ldap query; highly unlikely a backup would be doing it
exchange does ldap queries all the time which is why i asked in the first thread you opened on this question if the exchange server is in the same AD site as a global catalog

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pramod1Author Commented:
yes it is in the same AD site as GC
pramod1Author Commented:
can you elaborate further for high ldap query
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