Certificate and Owa issue

Hi Support,

I updated my exchange server using windows updates, one of the updates was "update Rollup 4 for Exchange Server 2010 Service Pack 2" & "Server 2008 R2 SP1" among others

After restarting the machine I get the error below when I click on Exchange Console -Server Configuration node

The Exchange Certificate operation has failed with an exception. The error message is: unknown error (0x0434f4d) It was running the command Get-ExchangeCertificate -Server

This has also caused my owa to fail, am able to hit https://localhost/owa site but it goes white/blank after a few seconds and o cant go beyond there even after restarting IIS.

Meshax