Starting with Symantec Mail Security for Microsoft Exchange (SMSMSE) 7.9 the previous 32-bit Intelligent Updater (IU) packages will no longer correctly apply. SMSMSE 7.9 has been updated to utilize 64-bit definition packages.
To update Symantec Mail Security for Microsoft (SMSMSE) 7.9 definitions utilizing Intelligent Updater (IU) follow the below steps:
Download the 64-bit Intelligent Updater (IU) Package for SMSMSE 7.9.x using either FTP or HTTPS.
Navigate to <InstallDir>\SMSMSE\7.9\Server\definitions\Antivirus
Determine the latest VirusDefs folder name (e.g. VirusDefs00000010)
Create new folder named "Previous sequence number +1" For above example: VirusDefs00000011. (Note: This folder name is case sensative)
Launch command prompt (cmd.exe) as "Administrator" then navigate to location of package downloaded in step #1
Run the following command: <IU_Package_Name>.exe /Extract VIRSCAN.zip "<InstallDir>\SMSMSE\7.9\Server\definitions\Antivirus\New version defs folder(e.g. VirusDefs00000011)"
Example using FTP package and Default Install path (Note: VirusDefs folder will still be variable):