In the last few days I have made several tests with SPS2013 and Office Web Apps 2013.

For the deployment and configuration I have used the following two articles:

• http://technet.microsoft.com/en-us/library/jj219455.aspx Deploy Office Web Apps Server
  
• http://technet.microsoft.com/en-us/library/ff431687.aspx Configure SharePoint 2013 to use Office Web Apps

When I was trying to activate the editing option in Office Web Apps I had a blocking step.

Issue:

On the Office Web Apps server I have tried to enable EditingEnabled option using the following command:

$edit = get-officewebappsfarm

$edit.EditingEnabled = $true

After executing the PowerShell command I had the following error message:

 “EditingEnabled” is a ReadOnly property

Resolution:

1. Access to your Office Web Apps server
   
2. Launch Windows Powershell as administrator
   
3. Execute the following command in order to list the configuration of your Office Web Apps Farm:

   Get-officewebappsfarm 

   
   

   Additional info regarding this command in the following article http://technet.microsoft.com/en-us/library/jj219434.aspx Get-OfficeWebAppsFarm

4. In order to enable Editing execute the following command

   Set-OfficeWebAppsFarm -EditingEnabled

Remark:

If you encountering a license issue when you try to edit a document execute the following PowerShell command on the SharePoint server:

$license = New-SPUserLicenseMapping -SecurityGroup “Domain Users” -License OfficeWebAppsEdit

$license | Add-SPUserLicenseMapping

Enable-SPUserLicensing

Additional information:

If you want to troubleshoot an Office Web Apps issue you need to change the logging level. In order to do this you have the following command:

Set-OfficeWebAppsFarm -verbose -InternalURL  “http://wacserver/” -LogVerbosity “” -OpenFromUrlEnabled –AllowHTTP

• Additional information in the following article http://technet.microsoft.com/en-us/library/jj219442.aspx

Once you have executed this command, reboot the Office Web Apps server and then reproduce your issue.

The default path for the logs is: C:\ProgramData\Microsoft\OfficeWebApps\Data\Logs\ULS

Remark:
ProgramData is a hidden folder.