I am having below question.
1). Is there any audit logs for PI ACE?
2). Also for user login-logout logs?
3). How many days PI SDK logs are available for PI ACE? If any configuration then how to check?
Please see link - PI Server - for the settings that are used for the configuration of the Audit trail.
This should help you on your way...
For User access - decimal value: 32
For PI ACE - (I would suspect that this will be logged under modules) - decimal value: 256
So this would mean, that the Audit Tuning parameter must be set to 256 + 32 = 286
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