We are experincing a peculiar issue with our ASA5510. It acts like it is shunning a remote connection when attampting to make an RPC via HTTP request from an Outlook client. If VPN is connected and we access Outlook Anywhere via LAN address we have no issues.
What leads us to believe we are being shunned is the inability to connect to VPN while outlook is open and attempting its remote connection. If outlook is closed then we can immedietly we can make a VPN connection.
We have disabled threat detection on our ASA in an attempt to pin point this issue. But even when it is enabled the shun does not appear when querying the ASA for shunned hosts.