A SBS 2003 R2 where the ISP started today to point mails. Clients can send mail and fetch mail but https://mail.publicdomain.fi/exchange
does not work Internally nor externally. the IP works. I run CEIICW today to have the certificate. This site haven't use Exchange before. The ISP did DNS change almost two hours ago. This server has built apx two years ago.
Any ideas how to fix this?