When utilizing a Policy Xpress (PX) policy to generate passwords via the CA random number generator, the ModifyUserEvent may fail.
This typically manifests when the system incorrectly identifies the generated password as a duplicate or recently used value.
Identity Manager 14.x & v15
This failure is caused by a timing conflict within the task and event processing model. When the PX policy is triggered, the validation logic for password reuse executes before the new value is fully committed, leading to a false-positive 'Reuse' message.
This is common when policies are configured to run at the 'Event' level instead of the 'Task' or 'UI' level.
To resolve the 'PasswordMessageType::Reuse Arguments' error, adjust the invocation timing of the Policy Xpress policy.