[Exchange 2013 - stand alone] Cannot open Outlook profile of Exchange 2013 users firstly.

HI all,

 Having Winserver 2008R2 is deployed Exchange 2013 into it. After that, from non-domain PC :

1. Create Outlook profile for Exchange 2013 user ---> successfully.

2. Open that profile -- > happen error:

cannot open your default e-mail folder. Microsoft Exchange is not availble. Either are network problem or the Exchange server is down for maintenance

Work arround: 

+ can ping to Exchange 2013 successfully,

+ in non-domain PC, open Exchange 2013 by OWa --> success.

Please give me your ideas to solve it.

Thanks.