Use this Knowledge Script to monitor changes to the list of global catalog (GC) servers defined in the forest. This script raises an event if new GC servers are added or any GC servers are run.
HINT:Global catalog placement is critical to Active Directory health, especially in branch office deployments. Carefully monitor GC placement to ensure that clients can always log in and use Microsoft Exchange, even if a WAN link is down. Proper GC placement also prevents significant accidental WAN traffic because clients will go to remote GCs if a local GC is not present.
Active Directory domain controller
The default interval for this script is Every 4 hours.
Set the following parameters as needed:
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Parameter |
How to Set It |
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General Settings |
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Raise event if job fails |
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Event severity when job fails |
Set the severity level, from 1 to 40, to indicate the importance of an event in which the GlobalCatalogChange job fails. The default is 35. |
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Monitor global catalog server changes |
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Enable job delegation? |
Select Yes to enable the delegation of the job to another server where appropriate. If enabled, runs the job on the selected computer that holds the server role (Domain Master or Schema Master) that you selected for the Delegate forest-wide monitoring to the... parameter. The default is unselected. For more information, see Section 3.1, AD Knowledge Script Job Delegation. |
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Delegate forest-wide monitoring to the |
Select the server role to which the job should be delegated: Domain Master or Schema Master. The default is Domain Master. |
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Raise event when DC assumes this role? |
If you enabled job delegation, set to Yes to raise events if the DC assumes the server role you selected for the Delegate forest-wide monitoring to the... parameter. The event indicates that the monitored computer has assumed the selected role. The default is Yes. |
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Event severity when DC assumes this role |
Set the severity level, from 1 to 40, to indicate the importance of an event in which the DC assumes the role you selected for the Delegate forest-wide monitoring to the... parameter. The default is 30. |
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Raise event when DC relinquishes this role? |
If you enabled job delegation, set to Yes to raise events if the DC gives up the server role you selected for the Delegate forest-wide monitoring to the... parameter. The event indicates that the monitored computer has relinquished the selected role. The default is Yes. |
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Event severity when DC relinquishes this role |
Set the severity level, from 1 to 40, to indicate the importance of an event in which the DC relinquishes the role you selected for the Delegate forest-wide monitoring to the... parameter. The default is 30. |
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Event Notification |
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Raise event if global catalog server changes detected? |
Select Yes to raise an event if GC servers are added or run. The default is Yes. |
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Event severity when changes detected |
Set the severity level, from 1 to 40, to indicate the importance of an event in which GC servers are added or run. The default is 25. |
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Data Collection |
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Collect data for global catalog server changes? |
Select Yes to collect data for charts and reports. If enabled, data collection returns:
The default is unselected. |