To make an individual (not automatic) online check, use the command CheckModuleSubscription.This command just checks, if a license is locked or not. The check is logged on the Activation Server 6.
If the product is already activated,
•Retrieve the main module ID using MainModuleID
•Retrieve the Serial Number using GetSerial
•Perform the online check with CheckModuleSubscription (specifying the main module number and using the Serial Number as ID) and set the parameter ForceCheck=true
This could be used e.g. within an update to make a one time online connection to validate, if the key / ID was locked.
See also Source Code Integration for regular online checks to get a detail overview about different options.
See also
Lock a license on the Activation Server