[EX2013] OWA and ECP redirect to the FBA page

http://support.microsoft.com/kb/3032024/EN-US


Exchange 2013 does not support Microsoft Software Key Storage Provider (CNG)

Check it with "certutil -store my <cert serial number>"

Import PFX file (with private key) in a Windows 7 machine and add the following key before export it as PFX again: 

Path: HKCU\Software\Microsoft\Windows\CurrentVersion\PFX
DWORD: NoProviderName
Value: 1

Import in the Exchange Server with the cmdlet:

certutil -csp "Microsoft RSA SChannel Cryptographic Provider" -importpfx "PFX file path"