When using the smc -cloudmanaged command to move Symantec Endpoint Security devices to a different ICDm it completes without error message and the clients do not move.
Symantec Endpoint Security where a password is configured in the Client Password Settings of the System Policy.
A password is set in the System Policy.
There are two options to workaround this issue:
1) A password is required when running an smc command. Refer to this techdocs page for proper synxtax.
2) The password can be removed temporarily from the System Policy until all devices are moved to the new domain.