Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm trying to install Exchange 2010 to a server in a site that uses an RODC. It tells me that "No domain controllers for the domain DOMAIN and the site SITE are available"

I'm going to be moving the Exchange server to the site with the main RW DC soon but I wanted to install Exchange before moving it. Is this possible?

share|improve this question
up vote 4 down vote accepted

The Exchange Server setup program requires a writeable Global Catalog Domain Controller (GC) in the Active Directory Site where the server is. A Read-Only Domain Controller (RODC) will not be used. You can't get around this requirement. Either temporarily promote a machine in the Site to be a DC or move the new Exchange Server machine to a different site.

Once the Exchange Server machine is operational you can remove the GC from the Site though this is strongly recommended against. Almost everything Exchange Server machines do (particularly the Client Access role) requires GC lookups.

Installing an Exchange Server does not require the Schema Master FSMO to be in the same site (or even accessible). Extending the schema (forestprep) does require the Schema Master to be operational and accessible, but this is an operation you do once per Active Directory forest before you do anything else with Exchange Server.

share|improve this answer

If Im not mistaken you have to install Exchange in a site where a writeable DC exists and where the schema master exists, as Exchange needs to write changes to the schema, etc.

share|improve this answer
-1 I'm sorry Joe. I like you, but I downvote wrong information. Schema master doesn't need to be in the same site in order to install exchange. The schema needs to be extended if this is the first 2010 server to be installed, but that can be done from any 64-bit server that has the schema master in its site. – Jason Berg Dec 15 '10 at 3:16
@Jason Berg: I understand. I should have been more explicit in my answer. I assumed the OP was extending the schema as part of the Exchange install and therefore would need to do it from a site with a writable GC and where the schema master exists. I should have been more specific. – joeqwerty Dec 15 '10 at 12:04

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.