I'm running Exchange 2007 on Windows Server 2008 Standard. We want to upgrade the server to Windows Server 2008 Enterprise, but I had read on a blog that there was a problem with Exchange not working after the upgrade to Enterprise. Is anyone aware of this? I can't find documentation on upgrading the server from standard to enterprise and the effect on Exchange 2007, or what steps to take to make it work again.

Where did you read that?I'd set all the Exchange services to manual and stop them before doing the OS maintenance. Of course a backup would be prudent at that point just because.

I had read another discussion forum on the internet (I'm trying to find the link to it again), and the situation was very similar where Windows was updated from 2008 Standard to 2008 Enterprise...it said that things went well, but permissions were changed and Exchange 2007 would not work...but, it didn't give specifics on what they changed to get Exchange working again, and I haven't been able to find other articles/discussions concerning the matter. I would just like to know everything I can before making the change and possibly affecting my production email.

“You can't upgrade Windows when Exchange is installed on the server” ----------Refer to <Exchange 2010 Prerequisites> Although the article itself is applied to exchange 2010, but I think the words above are said in generally “To deploy Exchange 2007 SP1 on Windows Server 2008, you must install Windows Server 2008 on a computer that does not have Exchange installed, and then install Exchange 2007 SP1” ----------Refer to <Exchange Server and Windows Server 2008> “You cannot upgrade the operating system in-place while Exchange 2007 (RTM or SP1) is installed. Thus, the only way to run Exchange 2007 on Windows 2008 is to do a fresh install of Windows 2008 and then install Exchange 2007 SP1” ----------Refer to <Exchange Server and Windows Server 2008, Part II> Based on my research, there’s no support for upgrade the windows when the exchange is installed on it. So I would suggest you to avoid such upgrade pathJames Luo TechNet Subscriber Support (http://technet.microsoft.com/en-us/subscriptions/ms788697.aspx) If you have any feedback on our support, please contact tngfb@microsoft.com

This isn't a version upgrade of the OS, though. That's where the confusion comes from. It's just a matter of getting the std/ent bit flipped, but if it's documented that running that install will break the IIS config with respect to Exchange, let's please reference that.It's certainly clearly documented that a Win2003->Win2008 upgrade isn't supported.

I agree. And, I have done this before where I was able to switch from one OS level to another, but the version of the OS was still the same. The difference for me this time was that Exchange is already on the box, and when I read that someone with a similar setup had a problem with Exchange working after the OS level was changed, then that concerned me and made me start searching for more information.James, I think the quotes you are giving are in reference to the installation of the initial release of Exchange 2007 on Windows Server 2008. You could not do this. You had to have Exchange 2007 SP1 (which is a complete installation, not just an SP) in order to install it on Windows Server 2008. Also, from what I understand, these quotes are referring to the fact that you cannot upgrade previous versions of Exchanged to Exchange 2007 SP1...it has to be a migration to a new server. Again, we're not doing a version upgrade of the OS, this is just switching from Standard to Enterprise...and, I think what Andy is saying is that if MS is saying that switching from Standard to Enterprise is considered a version upgrade, then that should be stated instead of being so generic with the little documentation that is available.I want to try this, but I feel I need to be ready to rebuild this server in case this does break Exhange.Thanks for all of the help/advice on this.

See. It would valuable info if you can share the result at here, which can help lot of people with the same questionJames Luo TechNet Subscriber Support (http://technet.microsoft.com/en-us/subscriptions/ms788697.aspx) If you have any feedback on our support, please contact tngfb@microsoft.com