The problem: After installing the Exchange 2013 server in a co-existence scenario with existing server exchange 2007 the outlook cannot connect to the new mailboxes, created in Exchange 2013, showing the credentials window and following error: “There is a problem with the proxy servers's security certificate. The name on the security certificate is invalid or does not match the name of the target site [server.domain.com]. Outlook is unable to connect to the proxy server. (Error Code 0).”
The owa access for the same mailboxes works fine and sending/receiving emails is possible.
When trying to open https://*-mail-01.*.local/rpc in the browser, it asks for credentials and then gives error 404.
Local domain aka *.local
Mail domain of @**.net
Exchange server 2007 sp3 *-mail.*.local
Exchange server 2013 cu9 *-mail-01.*.local
Certificate mail.*.local contains following namespaces:
Certificate is imported to both old and new exchange servers.
SMTP, IMAP, POP and IIS are signed by the new certificate in the Exchange 2013 server.
* - company internal domain name
** - company external email domain
Autodiscover: ip of Exchange 2013
Legacy: ip of Exchange 2007
MAIL.*.local: ip of Exchange 2013
Accepted Domains: **.net (standard domain), *.local
Virtual namespaces (as configured on the Exchange 2013 server:
URL (internal and external)
Integrated windows, standard
SSL-Activated, Standard,Client Certificate Ignore