Morning,

We have a customer that currently has a single server at their office running Exchange on Server Standard 2008. They have a second server which was at a remote office, the remote office closed and now they have brought the server back to head office. They would like to run a copy of Exchange on the second server, as a fall back should anything happen to the main server (which has been flaky, plenty of BSOD, IBM said there was nothing wrong, but that's a different problem).

The second server also runs Server Standard 2008, but does not have Exchange. The question is, what licences would it require to run Exchange on the second server? I have an idea that both servers would require Enterprise and Exchange, but I would like some clarification.

Thanks,

Stuart.

Nobody in this forum is qualified to quote licensing terms on behalf of Microsoft.

However, I can give you some well-known guidance.

For A DAG, you need Windows Enterprise.

For more than five databases, but practically more than three since you need one for public folders and probably want to reserve one for a recovery database, you need Exchange Enterprise.

You've posted in the Exchange 2013 forum and didn't state that you're using a different version.  So, for Exchange 2013, you'll need Windows Server 2008 R2 or Windows Server 2012.

I recommend you look up the requirements for Exchange Server 2013; these kinds of issues are very clearly explained in Microsoft's pages on the topic.