I have an application that accesses and updates SP document libraries. Using SP 2013 COM, it works fine locally. When the code is deployed to and executed in an Azure web site, a file not found exception is thrown re. msoidclil.dll during the creation of a SharePointOnlineCredentials object instance. After much frustration and research, it seems it is not possible to workaround this (however, if someone knows differently please tell me the solution, I'd be most grateful) and I've not been able to figure out / source an alternative means of authentication that will work in the backend code of an Azure web site and access my SP online lists.
Any suggestions or ideas? Thanks in advance.