Hi,
I had Migrated Exchange 2010 to Exchange 2013 successfully on a Virtual Machine and uninstalled Exchange 2010.
The current Exchange server Exchange 2013 (EX1) had CU1 and CU2 installed, and was running fine.
Now I had planned to move my EX1 to physical server. So on physical server EX2 server is created.
On EX2 I had installed Exchange 2013 and CU1 and CU2 and I was able to connect ECP.
But suddenly after some time the ECP is not working on both exchange server and I found below error.
When I access EX1 ECP the web page is blank and when I go to IIS I found below error.
And when I access EX2 ECP URL I found below error.