Unsure at this time. Something about the upgrade replaced the "NSResourceGuid" key in CoreSettings.config with a different GUID than what we see in the Symantec Management Agent UI on the Notification Server.
Please compare these two GUIDs: Symantec Management Agent (SMA) GUID displayed in the SMA UI on the Agent Setting page, and CoreSettings.config "NSResourceGuid" key. This is located (by default) at: C:\ProgramData\Symantec\SMP\Settings. You will need to find string "NSResourceGuid" inside the .config file and compare it with the GUID we see in the SMA UI settings page.
If the GUIDs are different then you will need to replace the "NSResourceGuid" key in CoreSettings.config with the SMA GUID.
After this is replaced, restart the Altiris Service, Symantec Management Agent service, Altiris Object Host Service and Altiris Client Task Data Loader Service. Once you do this you should see Client Task Agents connecting for Task.
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