I am having issues inside my LAN where I cannot connect to our OWA (well the first 10 users do and then it fails, the same for their Outlook Anywhere connection). We have a Cisco ASA 5510, and there are no denies, our IP address is not blacklisted, and we can do a trace form the ASA box to the webmail IP address with no failure. (I had Cisco on the phone and it all connected fine from their traces). The outlook clients all fail after it hits 10 clients and we get no email, and then we cannot get to OWA from these clients.
It's really strange, as we can connect ot OWA and Outlook anywhere from outside on any other Internet connection.
We have wiped the ASA 5510 and gone to a basic config, and we are still having problems. I even put an old Cisco box in and this failed as well, same issues.
I cannot see the Exchange side of this so I do not know what has happened, but I am told the IP address for webmail has changed.
We have a separate wireless line and we can connect fine.
Has anyone else seen this?
We have tried to connect from the firewall (on a laptop) to the web address and we can get to the webmail fine, its just from the internal network behind the ASA Cisco box where it around 10 client PC's connect, and can get to webmail, but after a certain amount of connections the new clients all fail.
We will try a different firewall.
Any help please?