I've been running an exchange server for a year, perfectly, no problems. This weekend, we put it behind Sophos UTM Web Firewall.
Now, my iPhone client is demanding to login every 5 minutes or so. After it goes to sleep, then wakes up, I have to reenter all credentials.
The error is: We are having trouble accessing your account. Please log in again.
This problem only occurs when going through WAF. When I have Exchange direct to the Internet, everyone logs in fine and stay logged in for the past 12 months.
I''ll supply more info, but please, where should I start? This has consumed my ENTIRE weekend.
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