VPMSECE.DLL errors in Outlook

These errors usually occur when something has changed, like the Symantec Endpoint Server address or a Symantec reinstall. You may be able to fix this error by deleting the extend.dat file from Outlook.

Close Outlook.

On XP browse to: C:\Documents and Settings\%username%\Local Settings\Application Data\Microsoft\Outlook. Delete the extend.dat file.

Reopen Outlook and see if error goes away.

On Windows 7 or Vista browse to: C:\Users\%username%\AppData\Local\Microsoft\Outlook. Delete the extend.dat.

Reopen Outlook and see if error goes away.