I have this issue when my client changes their office. My client has 2 office one in dubai and other in paris. there is a VPN connection between the sites. in dubai they have CCME and in Paris they have CCM cluster. we changed the extension numbering here in the dubai office and hence we now have few extensions overlapping in both the office.
the problem is when a guy in dubai calls the guy in paris(on the overlapping extension), he gets connected to the paris guy but ccme displays that he is connected to the local guy.
Also when a guy in dubai with overlapping extention calls any ther guy in paris and leaves a voice message, unity sends a mail as if the voicemail is left by the local guy.
any ideas how to resolve this?