Came across and issue during the deployment of Office Web Apps 2013 when hooking up with SharePoint which caused some confusion. Issue: Error messages from the web apps when activating through SharePoint documents: Word Document : “Sorry, there was a problem and we can’t open this document. If this happens again, try opening the document in Microsoft Word.” Excel Document: “We couldn’t find the file you wanted. It’s possible the file was renamed, moved or deleted”
As I started to configure our new SharePoint 2013 farm today I came across a problem when running the pre-requisites tool when it was attempting to install “Application Server and IIS Web Server roles” which resulted in very little in terms of error messages apart form “configuration error”. After much searching and reading on Technet I wasn’t able to find out exactly what roles and features needed to be install so I could do this step manually.
If you’re working with larger SharePoint farms it’s conceivable that you may have a requirement for multiple User Profile Service Applications. This is completely supported, however one thing to be aware of is the fact that each User Profile Synchronization Service instance only supports 1 User Profile Service Application. Therefore it you need to run two User Profile Service Applications with Synchronization you will need at least two servers running the User Profile Synchronization Service, one for each.