I get this erro rwhen trynin to access certain parts of subscriber web pages. i then get prompted for the username and password. I am able to continue operations once I enter the corect credentials. I am not using failover and would like this error to go away. i see the sam thing on another customers UNity Server.
I've seen this error before in relation to a DNS issue. I have a few clients using Unity as voicemail only so Unity is installed in it's own domain. I always use the http:///saweb url to access the administration pages and when I do a search for a subscriber it pops up a new window and replaces the ip address portion in the url with the host name of the Unity server and gives me the error you mention. If I replace the name with the IP address then it let me in. I haven't actively looked for a resolution so unfortunately I can't really help you there but you might be able to fix it by adding the hostname of your Unity box to your DNS server or set up a trust between your Unity domain and your network domain.