Exchange 2013, Outlook 2007 clients Problems with Outlook Anywhere connection

Hi everyone,

I have a mail system Exchange 2013 SP1, on Windows Server 2012 R2.

I have only one mail server with the Client Access and Mailbox roles Server. 
I have a Wildcard certificate type *. Mydomain.com. 


All connections to the Outlook Anywhere Outlook 2010, Outook 2013 work correctly. 

The ActiveSync connections are working properly, too. 

But Outlook 2007 clients connecting with Outlook Anywhere asking for credentials continuously fail continuously. 


How can I solve this? 

thank you very much

Microsoft Certified IT Professional Server Administrator