Proxyification and Exchange migration

Pict 1
Pict 2

All in the same AD site

Here after the scenarios :

1^st one it PROXY CAS E14 to CAS E12

2^nd one is redirection CAS E14 to CAS E12

1^st :

All E12 are E12 US with SP2

E12 External URL $NULL

E14 External URL = mail.mydomain.com

ð Proxy E14 to E12 not working (cant open E12 mailbox from OWA E14), it displays always (login/pass incorrect, under security log event about Kerberos)

2nd : current adopted solution

All E12 are E12 US with SP2

E12 External URL = E12.mydomain.com

E14 External URL = mail.mydomain.com

ð E14 Redirect URL to E12.mydomain.com and open E12 OWA