We are having MOSS 2007 SP2 on my windows server 2003 OS and now we r plainng to upgrade windows server 2003 to windows server 2008 R2. Could anyone let me know what are the steps i need to do before i upgrade and how to do the upgrade any precautions i need to take, any potential problems i may face..some thing like that. Thanks in Advance.

Hi, I know when I tried installing MOSS/WSS on 2k8, I ran into some errors when directly installing, and could not continue. From what I have read, MOSS SP2 is supported on Server 2008R2. Here is the official SP team blog: http://sharepoint.microsoft.com/blog/Pages/BlogPost.aspx?PageType=4&ListId={72C1C85B-1D2D-4A4A-90DE-CA74A7808184}&pID=507 With this being said, the ability to slipstream MOSS into the 2k8 build may be the best way to install. There are multiple guides on this subject on the web. Here is one: http://insomniacgeek.com/how-to-install-moss-on-windows-server-2008-r2/ Before you upgrade, you should create a backup of the site (I prefer the stsadm command for doing this) and at least a backup of the content databases being used. Another consideration you might make is using Hyper-V, which is included in 2008 R2, to host MOSS in a virtualized 2k3 environment. I don't know your exact requirements, but Hyper-V adds many features that may be beneficial in your case. Hope this helps.

I would go ahead and install SP1 for Windows server 2008 R2 before I install MOSS 2007 SP2. Save you some trouble later on. -SharePointNinja