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I'm trying to suspend a client from API by changing

$params['canceled'] = 'y';
$params['locked'] = 'y';

These are submitted to the client_update() function which is reflected in the interface marking respectively the checkboxes "Locked" and "Canceled" as activated. However this doesn't seem to have any impact on the client being able to login or not or neither does it seem to have impact on the client's websites, maildomains etc. being deactivated.

Marking Locked and Canceled in the interface manually works fine.

Am i missing something?