I have HTC Android based mobile, if I configure my exchange email account on this phone and synchronize it's showing the following error.
There are problems with the security certificate for this site.
X: This certificate is not from a trusted authority
And if I download certificate manually using internet explorer its showing page cannot be displayed.
Its showing use and Ignore option if I click on use option its showing page cannot be displayed. And if I click on Ignore option it's showing username and password is wrong.