Windows 2008 Direct Server Return not working

If you are having issues with getting Windows 2008 to work with DSR (Direct Server Return), chances are you have disabled your firewall and had no luck with it working, but after the commands below are executed you should be up and running.

netsh interface ipv4 set interface “net” weakhostreceive=enabled
netsh interface ipv4 set interface “loopback” weakhostreceive=enabled
netsh interface ipv4 set interface “loopback” weakhostsend=enabled

Exchange 2007 has the feature of reinstalling a server the exact way it was when it was operational. I ran into an issue in my development environment where I had to reinstall the server from scratch because it would not uninstall exchange 2007 or upgrade to Service Pack 2. Because this was a dev server I simply reinstalled the server from scratch. Installed Windows updates, I should also mention the server has to be the exact name it had before and was rejoined to the domain.
The first step I performed was putting in the Exchange 2007 CD and open up a command prompt
Change directory to CD drive, in my case the CDROM is D drive.
Type in the following command
setup /mode:recoverserver

In my case, I was missing patches that were needed by exchange installation. I visited Microsoft website plugged in all Error ID’s and download the needed software, but as you can see from the output it knows the exact way this server setup before.
After installing needed patches, I begain to run the command setup /mode:recoverserver again. As you can see from the output screen still no luck.

 
I searched for a bit on Google and had no luck with fixing this issue, so I decided to go to Plan B, I would force remove the server from active directory and reinstall exchange.

I Lunched ASEDIT, and added Configuration
I Click on Plus sign next to Configuration, CN=Services, CN=Microsoft Exchange, CN=DomainName, CN=Exchange Administraive Groups, CN=Servers
Here I delete the server having issues.

 
I got a prompt and clicked on Yes to continue

I got a warning stating you will be deleting the container and everything in it. I clicked on yes to continue.

 
 
I notice exchange wrote that my server was in recover mode because when I ran the installation again it told me I had to do a server recovery. I went to control panel and clicked on add remove programs and notice exchange installation was presient. I click on remove and uninstalled it. After this I check registry on the server and notice the registry and was still there, so I decided to remove it.
 
I Launched Regedit
Navigate to
+HKEY_LOCAL_MACHINE
+SOFTWARE
+MICROSOFT
Here I deleted the +EXCHANGE folder
 

After this I had to reboot my server because exchange was complaining that it has to reboot before starting any new installation.
Now I ran into a weird installation issue, my Default Offline Address Book was corrupted. Got this error during installation

I proceeded to delete it and recreate it with the following power shell commands.
C:\>Remove-OfflineAddressBook "Default offline address book"
Confirm
Are you sure you want to perform this action?
Removing Offline Address Book "Default offline address book".
Help
(default is "Y"):y
Confirm
The offline address book that you selected for removal is the default offline
address book. If you continue, Outlook users may not be able to access their
offline address books.  Are you sure you want to delete Default offline address
book?
Help
(default is "Y"):y
 
C:\>New-OfflineAddressBook "default offline address list" -AddressLists "default global address list" -Server exmbx01

 
 
After this, I was finally able to install exchange successfully.
 
 

Configuring IPHONE with Exchange 2007 Active Sync
From your IPhone navigate to settings menu and select Mail, Contacts, Calendars

Now fill in the following box as follows

Email: Your email address
Username : your email address
Password: your password

After verification you would be brought to this screen.
Under server box input the OWA URL
For example: mail.example.com

 
After clicking on next the setup will complete and you will be brought to what you would like to sync, after selecting what you would like to sync click on save to complete wizard.