Dear All

    our company have exchange 2013 and enable owa for internal and external user, I have implement Office web app server 2013 for work with Exchange server support about online edit document, our office web app server is implement on physical server and used digitcert ( external certificate ) for https, but last week I have power issue, it make these server is broken , so I create new VM with same computer name and IP address , and I join to domain and install office web app follow these KB ==> https://technet.microsoft.com/en-us/library/jj219455.aspx , but I and not sure it require to create new office web app farm or run other command to restore it, please advise 

Hi 

please try the below 

http://blogs.technet.com/b/office_web_apps_server_2013_support_blog/archive/2013/12/20/office-web-apps-2013-rebuild-your-farm-in-a-few-easy-steps.aspx

Dear Sir

    Thank you very much for your support, but I do not have any backup on configure webapp how I can do it