Exchange 2007 - 2013 Transition OWA

Hi everybody,

We are in a lab testing the Exchange 2013 coexistence with Exchange 2007.

We have one Exchange 2007 and three Exchange 2013 (one DAG).

After the Exchange 2013 installation we have some mailboxes in Exchange 2007 and some mailboxes in Exchange 2013.

All seems be fine with outlook client. But OWA is not working, so when we connect to Exchange 2013 Server we cannot to access to mailboxes in Exchange 2007. This is normal.

Then, we added the A registry with legacy name (for the Exchange 2007) in DNS and it doesn't work.

The question is...we need a certificate with legacy name for Exchange 2007 or can we update to CU2 and then we don't need any more?

Thanks in advance.

Best Regards.