We have a ASA 5505 for our office firewall/router. We periodically get errors in Outlook that say your connection to exchange has been lost, and then restored a minute or two later. At first I couldn't figure out what was causing it but a few weeks ago the ASA failed and I had to get another one but ti took a few weeks to get ordered. In the meantime we were using a Netgear router. While we were using the Netgear the Outlook/Exchange problems stopped. We just got the replacement ASA last week and now we're having those problems again. Beyond being the default gateway for our network I don't see how it is causing these problems but it is. Can anyone think of why it would be causing this problem or how to fix it.