There is a parameter under Admin>Account Settings>Organization Settings Settings tab called
Timeout Seconds. To my mind, that should set the default value on Users when they are created...but it doesn't.
If you think that is a bug, and it
should set the default value for a new user, you might open a support case to have it looked into.
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George Ganahl CCXP, GCP
Principal Technology Consultant
Genesys
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