We can access the Web Apps and view the XML with no issue on any machine on our network. We verified "get-spwopizone" is set to internal-https We tried adding the Cert through Central Admin > Security > Manage Trust which did not help. We tried creating a Cert through Active Directory Certificate Services which did not work. We tried creating a Self-Signed Cert through IIS on the Office Web Apps Box which did not work. None of the article provide specific step-by-step instructions with using HTTPS in a test environment specifically when it comes to Self-Signed Certs through Active Directory Certificate Services. at (IAsyncResult asyncResult) at (IAsyncResultĪr) - End of inner exception stack trace - at (IAsyncResult asyncResult) at .Common.Ht. 7bed0d51-511d-4541-a059-e2f72942e617 : The remote certificate is invalid according to the validation procedure. HttpRequest failed -> .Common.HttpRequestAsyncException: No Response in WebException -> : The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. 13:38:40.24 w3wp.exe (0x1C04) 0x1BB4 Office Web Apps WAC Hosting Interaction adhsk Unexpected WOPI CheckFile: Catch-All Failure [exception.EnvironmentAdapters.UnexpectedErrorException: We reviewed the ULS logs and found the following error: We found a few How-To Setup Office Web Apps sites where other people provided step-by step instructions: We finally have what I thought was a correct setup but anytime we try to edit or view a word, excel, powerpoint document within SharePoint 2013, we receive "Sorry, there was a problem and we can't open this document. We are trying to setup a new server (Server 2012 R2 Datacenter) (Servername: ) to run Office Web Apps 2013 in our TEST environment to test the system before rolling in production and have had issues throughout the entire process. SQL Server (Server 2012 Datacenter) - Servername: Central Admin Server (Server 2008 R2 Enterprise) - Servername: ģ. Web Front End Server (Server 2008 R2 Enterprise) - Servername: Ģ. We currently have a three tier SharePoint 2013 Farm:ġ.