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>From Michael Kaczmarek at Microsoft:
Here is an excerpt from the developers. It gets somewhat
technical, but in essence this is a by design feature. Please let me
know if you have any questions.
Excerpt follows...
>This is absolutely by design. we do not cache passwords, we
>cache credential information (a token). this is a significant
performance
>optimization. dogfood was overloading domain controllers before it was
put in place.
>an administrator who wishes to disable credentials caching can
>do so by creating a DWORD value under ParametersNetif called
"Credentials
>Cache Size" and setting it to 0. warning: domain controllers may get
>overloaded, as each POP3 logon will cause an NT logon.
>
>Here is some more info on three reg values that make up caching.
>
> Credentials Cache
> H_Key_Local_machine\System\Current Control
> Set\Services\MSExchangeIS\ParametersNetIF
> Credentials Cache Size D_WORD 0 - 0xffff (default 256) value of
> 0 is cache off.
> Credentials Cache Age Limit D_WORD minutes (default 2 hrs = 120
> minutes)
> Credentials Cache Idle Limit D_WORD minutes (default 15)
> Descriptions:
> Credentials Cache Size: The size of the Credentials Cache Link
> list. A value of 0 Turns cache off.
> Credentials Cache Age Limit: How long the Credentials for are
> cached.
> Credentials Cache Idle Limit: How long until credentials are
> flushed due to inactivity.
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