From Configurations > Plugin Configuration Monitor, you can quickly check which suppliers are active for each client.
It is possible to optionally apply the following filters:
Client Name
Network: default is All
Web services: default is Yes (i.e., clients with level 2 web services)
Clicking Search will display both Clients and Suppliers, and you can optionally select only those of interest.
Clicking the second Search button will generate the monitor table:
Red: the plugin is inactive
Green: the plugin is active
It is also possible, for each listed supplier, to massively apply a plugin block to all Clients by clicking the x icon.