Exchange 2007 Upgrade fails to SP3 with the Error code is 1612.

Hello friends , On this Post i will discuss one of the error that you might come across while upgrading Exchange 2007 SP1  to it’s higher service pack or Roll up update. While upgrading you might get a pop up “Click ok to try again, or enter an alternate path to a folder containing the installation package ‘Exchangeserver.msi’ in the box below” . The pop up will ask you to redirect you the correct .msi file however even if you point the the file to the correct .msi file it wouldn’t take it. Eventually the only option is to cancel the upgrade. If you check the Exchangesetup.log you will get error like this.

[ERROR] Unable to remove product with code 24b2c164-de66-44fe-b468-a46d9d5e6b31. The installation source for this product is not available. Verify that the source exists and that you can access it. Error code is 1612.

Below is the snapshot of the pop up windows that we get during the upgrade.

If you check the Exchangesetup.msilog , You will get below error.

MSI (s) (C0:E0) [03:04:45:354]: Machine policy value ‘DisableUserInstalls’ is 0
MSI (s) (C0:E0) [03:04:45:354]: Note: 1: 2766 2: C:\Windows\Installer\13253.msi
MSI (s) (C0:E0) [03:04:45:354]: Warning: Local cached package ‘C:\Windows\Installer\13253.msi’ could not be opened as a storage file.
MSI (s) (C0:E0) [03:04:45:354]: User policy value ‘SearchOrder’ is ‘nmu’
MSI (s) (C0:E0) [03:04:45:354]: User policy value ‘DisableMedia’ is 0
MSI (s) (C0:E0) [03:04:45:354]: Machine policy value ‘AllowLockdownMedia’ is 0
MSI (s) (C0:E0) [03:04:45:354]: SOURCEMGMT: Media enabled only if package is safe.
MSI (s) (C0:E0) [03:04:45:354]: SOURCEMGMT: Looking for sourcelist for product {24B2C164-DE66-44FE-B468-A46D9D5E6B31}
MSI (s) (C0:E0) [03:04:45:354]: SOURCEMGMT: Adding {24B2C164-DE66-44FE-B468-A46D9D5E6B31}; to potential sourcelist list (pcode;disk;relpath).
MSI (s) (C0:E0) [03:04:45:354]: SOURCEMGMT: Now checking product {24B2C164-DE66-44FE-B468-A46D9D5E6B31}
MSI (s) (C0:E0) [03:04:45:354]: SOURCEMGMT: Media is enabled for product.
MSI (s) (C0:E0) [03:04:45:354]: SOURCEMGMT: Attempting to use LastUsedSource from source list.
MSI (s) (C0:E0) [03:04:45:354]: SOURCEMGMT: Processing net source list.

To resolve the issue Download Windows cleanup utility. Microsoft has removed the Windows cleanup utility from their website however you will be able to find the application on many website for free download. Install the Windows cleanup utility and run the Application.

Note:- Removing entries using Windows clean up utility can cause severe issues to the server so make sure you take a back up before making any changes to the server.

Remove the below entries from the Windows cleanup utility.

1.Microsoft Exchange Server
2.Microsoft Exchange 2007 Enterprise Anti-Spam Signature
3.Microsoft Exchange 2007 Enterprise Block List Update
4.Microsoft Exchange 2007 Standard Anti Spam-filter Update

Please make sure you don’t delete any other entry other then the above entry.
Reboot the server. You should be successfully able to upgrade the Exchange 2007.