Error when trying to reinstall Client Access role
because I had a problem with a dll that was corupted and coulden't been enymore used by OWA, I decided to reinstall Client Access role. So, I'veuninstalled the CA role using setup /mode:uninstall /role:CA without problems, but wen I'm trying to reinstall it I have the folowing error. The samewith the graphical wizard. E:\>setup /mode:install /role:CA Welcome to Microsoft Exchange Server 2007 Unattended Setup Preparing Exchange Setup The following server roles will be installed Client Access Role Performing Microsoft Exchange Server Prerequisite Check Client Access Role Checks ......................... COMPLETED Configuring Microsoft Exchange Server Opening package 'E:\exchangeserver.msi' failed. Another version of this product is already installed. Installation of this version cannot continue. To configure or remove the existing version of this product, use Add/Remove Programson the Control Panel. Error code is 1638. The Exchange Server setup operation did not complete. Visit http://support.microsoft.com and enter the Error ID to find more information. Exchange Server setup encountered an error.
November 29th, 2007 9:36pm

Exchange 2007 - Error code is 1638 Download the Windows Installer Cleanup Utility using the link below: http://support.microsoft.com/?id=290301 Clear the following instances of Exchange 2007 using the 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 5. Microsoft Full Test Indexing Engine for Exchange Set the Exchange 2007 services to Automatic in services snap-in if they are not set to Automatic
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May 6th, 2008 12:47pm

Clear the following instances of Exchange 2007 using the utility: Is this for real? Has anyone tried this. I am having the same problem with CAS.I cannot install it or remove it. Thanks, Michael
July 23rd, 2008 3:33am

You will receive this error if you try to reinstall the role from your original installation files/CD after you have applied SP1 to your server. If that's the case, the solution is toreinstall the rolefrom the SP1 setup.
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July 23rd, 2008 2:07pm

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