Infrastructure Master (IM)
Infrastructure Master
When an object in one domain is referenced by another object in another domain, it represents the reference by the GUID, the SID (for references to security principals), and the DN of the object being referenced. The infrastructure FSMO role holder is the DC responsible for updating an object’s SID and distinguished name in a cross-domain object reference. At any one time, there can be only one domain controller acting as the infrastructure master in each domain.
The Infrastructure Master (IM) role should be held by a domain controller that is not a Global Catalog server (GC). If the Infrastructure Master runs on a Global Catalog server it will stop updating object information because it does not contain any references to objects that it does not hold.
This is because a Global Catalog server holds a partial replica of every object in the forest. As a result, cross-domain object references in that domain will not be updated and a warning to that effect will be logged on that DC’s event log. If all the domain controllers in a domain also host the global catalog, all the domain controllers have the current data, and it is not important which domain controller holds the infrastructure master role.
What happens when infrastructure Master is not available
A failure of the infrastructure master will be noticeable to administrators but not to users. Because the master is responsible for updating the names of group members from other domains, it can appear as if group membership is incorrect although, as mentioned earlier in this lesson, membership is not actually affected.
You can seize the infrastructure master role to another domain controller and then transfer it back to the previous role holder when that system comes online.
Initial replication and connectivity requirements
- This FSMO role holder is active only when the role owner has inbound replicated the domain NC successfully since the Directory Service started.
- There is no connectivity requirement for this FSMO role holder. It is a forest internal cleanup functionality.
So, that’s all in this blog. I will meet you soon with next stuff .Have a nice day !!!
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