When changing the service account for Symantec Management platform 7, you see the following:
When you attempt to open the NS Console:
Symantec Management Server Error
An error has occurred that prevents the Symantec Management Console displaying correctly.
If this page is shown in place of a page or web part in the Symantec Management Console, navigate back to the page using the menu or tree and continue working. If the problem persists, see your local network administrator.
If this page is shown in place of the Symantec Management Console, one of the following could be the cause:
C:\Program Files\Altiris\Notification Server\bin\AeXConfig.exe /svcid user:(user name) password:(password)]", substituting the correct installation path if a non-default location was used, to provide a new account.
In both cases, the Symantec Management Server log and the Windows Event log may contain useful information. The Symantec Management Server log can be accessed on the server by running "Start" menu > "All Programs" > "Altiris" > "Diagnostics" > "Altiris Log Viewer".
(#) If the NS hosted computer has yet been renamed, a better alternative would be to point all NS clients to the new server name first. You can do this by going to the menu "Settings" > "Agents/Plug-ins" > "Targeted Agent Settings". For each policy in the list, select the "Advanced" tab and specifies the new server name under the "Alternative URL for accessing NS" section. By doing this, all the clients will work automatically once the NS server has been renamed
In this case, there were 2 causes to this:
1) DefaultAppPool was set to IWAM_MachineName account rather than the NetworkService account
2) Default WebSite had a connection limit in place (In this case, it was set to allow only "5" Concurrent connections.
To resolve this issue:
1) Open up the IIS Manager
2) Right-click on DefaultAppPool and select "Properties"
3) Click on the "Identity" tab
...Ensure that it is set to "Predefined: Network Service"
4) Click "OK"
5) Right-click on the Default Web Site and select "Properties"
6) Click on the "Performance" Tab
...Ensure that "Web site connections" is set to Unlimited
7) Do an IISRESET from the command line
At this point, you should be able to change the password by running AexConfig.exe /svcid user:<Domain\Username> password:<Password>
...Watch the logs for errors (Just in case).
Notification Server 7.0 (Initially noticed on SP2)
Environment where Service Account passwords are changed on a regular basis.