Use cases for replacing the Cloud SWG WSS Agent (WSSA) client:
Each WSSA client installer is "binary stamped" with a unique customer ID (which is the Cloud SWG tenant ID). This client ID cannot be changed in the client installer.
Upgrading the WSSA client will not change the client ID.
To use a WSSA client that is registered ("stamped") to a different Cloud SWG tenant, the WSSA client must be uninstalled and the new WSSA client installer (from the new tenant) must be run.
In other words, the only way to change the tenant that the WSSA client points to is to: