Not monitored state on Operations Manager Agents or Management servers

It is very common to see  agents or management servers in a not monitored state.

Following is a great post by SCOM Engineering Blog which shows out a bunch of reasons for this to happen.

http://blogs.technet.com/b/momteam/archive/2008/03/10/getting-headaches-trying-to-figure-out-why-you-are-seeing-the-not-monitored-state-for-management-servers-or-agents.aspx

Journal Wrap

This is a very informative article about journal wrap which I came across.

Gives out very detailed description on;

• How journal wrap occurs
• How to recover and best recovery methods
• How to avoid

and calculating the number of changes that a given USN journal file can hold and so on.

http://support.microsoft.com/kb/292438

Here goes a detailed description of FRS entries in the Registry

and lastly, Here is another good article describing all about recovering from Journal wrap and burflags!!

Performing Active Directory Health Checks.

AD health Checks..a complex and an inevitable job as a systems engineer and a one shich invloves very careful documentation.(ah! documentation! I Love it! )

I usually have MSP reports and DCDIAG carrying out the task for me but using the tools just is not enough. You should know what to look at and where to look at and prepare your reports effectively.
When large deployments are involved, completing a health check is a time consuming task and leaves  I-need-instant-results folks frustrated.

in the following links you may find some procedures explained and usually comes in handy when it comes to health checks on AD.

http://searchmidmarketsecurity.techtarget.com/tip/How-to-perform-an-Active-Directory-health-check

http://redmondmag.com/Articles/2012/07/01/5-Free-Microsoft-Tools-for-Top-Active-Directory-Health.aspx?Page=1