When using Environment Manager 8.1 or later, you find that no Logoff actions are applied, and Desktop Settings / Session Data / Windows Settings Groups are not syncd at logoff.
Monitoring a user logoff, you observe that EmUserLogoff.exe (the process that handles all logoff actions) is never launched.
In Environment Manager 8.1 through to 8.4, EmUserLogoff.exe is launched via EMExit.bat, which is configured to run at logoff.
If the 'Prevent access to the Command Prompt' Group Policy is enabled (User Configuration\Administrative Templates\System\DisableCMD), with the 'Disable the command prompt script processing' option, EmExit.bat is blocked and logoff actions are not applied.
NOTE: By default, this will not affect Environment Manager 8.5 onwards, however, if the new "Logon Sub-triggers" are disabled within the configuration, this reverts the logoff mechanism to use this legacy method, which will expose this issue.