How to preven session time outs in OWA Exchange 2003

I need to change the time out for seesion to expire in OWA Exchange 2003.  i don't know what the default is, but I'm getting calls from branch offices stating the following keeps happerning: Your session has expired. To continue your work, please re-enter your domain\alias or your e-mail address and password, and then click Log On

Does anyone know a answer to this?

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"Note:  You can change the default timeout by changing the following registry setting:

Registry Value: PublicClientTimeout
Value Type: REG_DWORD
Value Data: (possible setting decimal)


Registry Value: TrustedClientTimeout
Value Type: REG_DWORD
Value Data: (possible setting decimal)

On both registry values the possible settings will vary from 1 – 4320 (minutes). After changing these settings you have to restart your W3SVC service."

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Please not that the registry key on my server is slightly different from the one posted (perhaps a different level service pack?).

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ExchangeWeb\OWA on my system it is:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeWeb\OWA <-- Note the MS in front of ExchangeWeb.

Just a quick note to help others.
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