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How many GC's per domain

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quell

IS-IT--Management
Nov 8, 2002
363
US
Hi, Quic question..We are a one domain, one site operation with 5 servers 3 dc's All have the GC option checked and now I'm having some problems migrating email boxes. My question is how many GC should there be a for a small domain?
Thanks
 
You can have as few as one, but you should probably make two of your DC's GC's so anytime you needed to reboot one, the other would handle everything until the first came back up.

I'm Certifiable, not certified.
It just means my answers are from experience, not a book.
 
You do not want the one with the infrastructure master role to be a GC ......
 
vbrocks,

When I removed my Infrastructure Master as a Global Catalog receipient, I got this event warning...

Event Type: Warning
Event Source: NTDS General
Event Category: Internal Processing
Event ID: 1534
Date: 3/31/2004
Time: 10:38:26 PM
User: NELC\administrator
Computer: MORPHEUS
Description:
This machine holds the Domain Master Role, and is not a GC. These two states are incompatible. Either this machine should be made a GC or the role should be transferred to a machine that is a GC.
 
This machine holds the Domain Master Role, and is not a GC. These two states are incompatible. Either this machine should be made a GC or the role should be transferred to a machine that is a GC.


You should not have removed the gc from this server, restore the gc to this server, you should transfer the infrastructure role to another server.
 
I see, the Domain Master Role refers to the Schema Master?
 
Domain Naming Master
Schema Master
Relative Id Master
Infrastructure Master
PDC Emulator Master

The root Domain controller should be the Domain Naming Master and Schema Master .....
If it is the only dc in the domain it has the other roles too. If it is not, then the other three roles should be given to other dcs in the root domain....
 
Domain Naming Master - AD domains and Trusts
Schema Master - MMC AD Schema Snapin
Relative Id Master - AD Users and Computers
Infrastructure Master - AD Users and Computers
PDC Emulator Master - AD Users and Computers

Domain Naming Master
In AD domains and Trusts right click on
Active directory Domains and Trusts ...
Select Operations Master

The procedure is pretty much the same for the rest, you just go in and rightclick and pick Operations Master...
 
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