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Answer 1

+3 A:

check slidingExpiration in web.config and make sure it's set to true

<authentication mode="Forms">

    slidingExpiration="true" />
</authentication>

also is this load balanced web site? make sure session information is out of process, or use sticky session.

Hussain Saleem 2010-01-13 18:44:42

The attribute is not defined in my web.config and its default value is true. Also, yes, this is in a load balanced environment, but we don't use session and there is currently only one server in the pool.

Matthew 2010-01-13 18:49:33

If you don't own the code base, look for anything that will alter the cookie value or possible that FormsAuthentication.SignOut() is getting called somewhere

Hussain Saleem 2010-01-13 19:49:15

There are no obscure calls to SignOut() and we don't alter the value of the cookie.

Matthew 2010-01-13 20:03:44

I can't think of anything else beside debugging, trace, check machine configu. However I would probably add the slidingExpiration attribute to the config file. good luck

Hussain Saleem 2010-01-15 17:39:50

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Forms Authentication Cookie Expiration

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