Computers with SonicWall Enforced Anti-Virus installed on it has issues when trying to open Microso
03/26/2020 5 10615
Computers with SonicWall Enforced Anti-Virus installed on it has issues when trying to open Microsoft Outlook (all versions)
Issue: When trying to open Microsoft Outlook, the program hangs and goes into a non responsive state.
Microsoft Windows (All supported versions)
Microsoft Outlook XP
Microsoft Outlook 2007
Microsoft Outlook 2003
Microsoft Outlook 2000
SonicWall Enforced Client Anti-Virus versions 4.5 and 4.7
Cause: This problem is due to the design of Microsoft Outlook. This issue will not be seen with any other mail client. McAfee utilizes the Microsoft approved manner of switching out the scanemal.dll. However this method only works for one user. This issue will only be seen on shared computers with multiple user profiles.
When a change is made to the location of the email scanning component of VirusScan, this information may not be reflected in the EXTEND.DAT file used by Outlook.
Outlook caches its registry settings in the EXTEND.DAT file to improve performance by removing the need to access the registry each time the application is launched. If a change to the registry settings for Outlook has not yet been synchronized with the information in EXTEND.DAT, Outlook will not have the newer information. Deleting EXTEND.DAT requires Outlook to verify the registry and Add-in information before re-creating the file.
Resolution: Remove the Exchange Scan Add-in via Outlook
To remove the Exchange Scan Add-in in Outlook 2000/2003 and XP:
- Open Microsoft Outlook.
- From the menu click Tools, Options.
- Click the Other tab.
- Click Advanced Options.
- In the lower part of the window click Add-in Manager .
- Uncheck Exchange Scan.
- Click OK until all windows are closed.
- Close and reopen Outlook.
For Outlook 2007:
- Open Microsoft Outlook 2007.
- Click Tools, Trust Center, add ins.
- Located in the bottom right corner is the option Manage.
- From the the drop-down list, select Exchange Client Extension and click Go.
- In the Add In Manager window, deselect Exchange Scan and click OK.
- Close and re-open Outlook.