Package Server gets the following error: No package sources returned by server (-2147023728).
In the Altiris Console, on the Configuration tab, under Server Settings > Package Servers, the packages all show in the "Pending Packages" cell.
On the Package Server, in the Altiris Agent details on the Package Server tab, all the packages remain in Downloading or Pending state.
The Package Server is in a site that does not contain the Notification Server and the Package Server is marked as a "constrained" Package Server in the site.
A "constrained" Package Server can only download packages from an "unconstrained" Package Server within the same site; as one does not exist in this case, the Package Server is unable to download packages from any site.
In Altiris Console > Configuration > Server Settings > Notification Server Infrastructure Site Maintenance, on the Package Server tab, make sure that the Package Server is not marked as "Constrained" if it is the only Package Server in the Site. Then go to Altiris Agent Configuration > All Package Servers policy and update the configuration (to force a download of the changed policy to the Package Server).
Then on the Package Server, go to the Altiris Agent Details and on the Package Server tab, click the Refresh Packages and the Resend Package Status buttons. Packages should then start downloading.
Notification Server 6.0 SP3 (6.0.6074)
The Package Server is in a different site to the Notification Server.