Endpoints are using speed tests to dermine task server connectivity and availability.
ITMS 8.0, 8.1
Use the NoSpeedTests registry setting for each server entry on endpoints.
A command line run script task can be used to modify/create the value.
Example:
reg add HKEY_LOCAL_MACHINE\SOFTWARE\Altiris\Communications\Servers\http//<SiteServerFQDN1> /t REG_DWORD /v NoSpeedTests /d 1 /f
reg add HKEY_LOCAL_MACHINE\SOFTWARE\Altiris\Communications\Servers\http://<SiteServerFQDN2> /t REG_DWORD /v NoSpeedTests /d 1 /f
This step will need to be done for each server entry at the registry location.