The default value is 5 but can range from 1 to 20. Think of this setting as being similar to the
enforce password history value within password policies on the domain. The PINLifetime parameter is
how long the issued PIN is good for. By default the value is 60, but can be set from 1 to 999. To prevent a
user ??™ s password from ever expiring, pass the PINLifetime parameter with the unlimited value.
During the pilot phase of a UM implementation, there may be times when correctly entering the PIN
sounds like an easy task, but in all reality it is not. Timing issues between the user input and the timeout
value, latency between the IP gateway and the UM server, or DTMF issues can prevent a user from
successfully logging in to the UM system. For users to be able to gain access to the UM system, a reset
PIN after too many failures can be configured. By default this value is set to 5 and can be set to 999 to
disable automatic reset of users ??™ PINs. To configure this setting, use the
LogonFailuresBeforePINReset to set a value between 0 to 999.
One other feature that can be set in the UM mailbox policy pertains to the security of the user. After too
many unsuccessful logon attempts, the UM portion of a user ??™ s account can be locked out. By default, this
is set to 15 , which will allow users to have multiple chances to access their account.
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