This is an update to this issue. Here is the support information:

http://seer.entsupport.symantec.com/docs/288472.htm

I recently upgraded to 8.0.3 and tried to install the VAC on my machine and am running into this issue again.  Originally, it worked fine to install the Oulook Add-In first and then install the VAC.  Now, I have uninstalled the 8.0.1 add-in, uninstalled the 8.0.1 VAC, rebooted, installed the 8.0.3 add-ins, run Outlook to verify the install was complete and working, reinstalled the 8.0.3 VAC and rebooted.  After reboot the add-ins act as if they need to complete the install again and then throw the error message.  Even so, if I click OK a couple times the add-ins are installed and seem to work.  However, if I run Tech Info I get an error on the http connection:

VERSION INFORMATION 
Operating System Professional  (Build 7600)
Outlook Microsoft Outlook 2007
Internet Explorer 8.0.7600.16385
Enterprise Vault Outlook Add-in 8.0.3.1845
VBScript component (Outlvbs.dll) Available
 
 
USER DETAILS 
User Mailbox /o=coa/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=rsrust
Outlook connection state Online (1)
RPC over HTTP flags 7
 
 
TESTING CONNECTION 
Skipping DCOM tests HTTP client is in use
HTTP connection failed https://evault.coaccess.com/EnterpriseVault (Status: 0x12)
 
 
Any ideas??

Ahh - I just answered my own question.  I should have tried this fist: ran ResetEVClient.exe and it fixed the problem.

I feel like ive taken stupid pills but I'm pretty sure the vac installs and registers Valkyrie against outlook regardless of outlook add in

Hi,

I have asked this to be fixed in V8 sp4.  So when that comes out I'd be keen for you to try it out and let me know if the client and the VAC on a workstation do indeed get along better.

Cheers,
Mike