Hi I am using the following link to generate a URL with preauth value
Preauth - Zimbra :: Wiki

Here,as specified I am giving the expiration time as 1 day in milliseconds.

It works fine if I open the URL immediately after it creation, but if I use the URL after sometime(arnd 5 minutes) it gives me the error message authentication failed.

Does anybody have any idea? should not the URL to valid for atleast that 1 day?