3278264 - Unable to load server configuration SAP UI Landscape file on Sharepoint

• After setting a configuration file on server using a file on a Sharepoint / Group site the following error is received:
  "The following server configuration file may be incorrect or unavailable https://path_to_server_file." Server response is not in XML format.
• The server configuration file loads correctly when just put in another folder on user local machine (e.g. C:\temp\).
• SAP cache file traces can show failed HTTP requests with 401 status (unauthorized):

SAP::FrontEnd::FileCache::CFileCache::Download_Inet_URL_By_WinInet: Opening and sending HTTP request with URL 'https://<hostname>.sharepoint.com/sites/Shared Documents/SAPUILandscape.xml'. 

SAP::FrontEnd::FileCache::CFileCache::Download_Inet_URL_By_WinInet: HTTP request failed with status 401. On HTTP error we cannot download the file.

• The configuration file is shared in the Sharepoint on Cloud, differently from On-premise within internal network scenario outlined in the SAP Note 3210315, which is supported as of SAP GUI 770 Patch Level 9.

SAP GUI for Windows

SAP UI landscape file, Sharepoint, configuration file, HTTP request, 401, unauthorized. , KBA , BC-FES-GUI , SAP GUI for Windows , Problem