3.2.7.1 Policy Application Mode Initialization
The Policy Application Mode is initialized to the Computer at the time the computer boots, or to the User at the time a user logs on. Policy application SHOULD be invoked at the following times:
When the computer boots.
When a unique user logs on. Append to abstract element Policy Target User Name the user principal name of the user logging on.
During periodic timer expiration as specified in section 3.2.2.
At user initiation. That is, a user could manually initiate a process that causes the Group Policy: Core Protocol to immediately attempt to get the client's state in compliance with the most recent policy settings that are stored in GPOs on the server.
When a computer regains network connectivity to a Group Policy server after a prior policy application failure due to the lack of network connectivity to a Group Policy server.<23>