I have a new Exchange 2007 SP1 server that has been added to an existing Exchange 2000 organization. I can connect from Outlook 2003 & 2007 with no problem. I can connect via OWA with no problem. When I try to connect from Entourage I get the following message: "Unable to establish a secure connection to <IP Address> because a certificate on the server's certificate chain has expired or is not yet valid. Please check that your computer's clock is set to the correct time." If we click OK, it connects and works fine, but I don't know why I'm getting this message. The clocks on the server and the client are set correctly, and the certificate is valid.
In article , Rich Brown wrote: > I have a new Exchange 2007 SP1 server that has been added to an existing > Exchange 2000 organization. I can connect from Outlook 2003 & 2007 with no > problem. I can connect via OWA with no problem. When I try to connect from > Entourage I get the following message: > > "Unable to establish a secure connection to <IP Address> because a > certificate on the server's certificate chain has expired or is not yet > valid. Please check that your computer's clock is set to the correct time." > > If we click OK, it connects and works fine, but I don't know why I'm getting > this message. The clocks on the server and the client are set correctly, and > the certificate is valid. Are you using the self-signed certificate that Exchange 2007 installs? Have you verified the contents of the client Mac's cert store to make sure you don't have any invalid certs in it? Cheers, -Paul
