@Teamrutland wrote:
Started seeing an issue today when an device trying to contact O365 with any mail program comes up with this certificate error issue.
Hmmm. Interesting that the certificate is "self signed" for www.routerlogin.net, which has absolutely nothing to do with Office 365.
Netgear ran into a horrible mess a year ago when the SSL certificates that Netgear had created for their routers expired and were not renewed. (No one has ever said if (a) Netgear simply forgot to renew them, or (b) the certificate authority had decided no longer to support generic names such as "routerlogin.net".) As I recall, Netgear had a bunch of SSL certs (routerlogin.com, routerlogin.net, orbilogin.com, orbilogin.net, etc.)
My guess is that this is a result of a software update in the email programs that now rejects "self signed" SSL certificates.
If getting to the email is really important, you might try selecting the option, "go there anyway."
