I shared a folder on Windows 2012 R2 Server, set permission to user (run Orthanc server) for read/write on share and NTFS.
W1205 10:39:57.692355 main.cpp:1297] Orthanc version: 1.3.1
W1205 10:39:57.693355 OrthancInitialization.cpp:162] Scanning folder "Configuration" for configuration files
W1205 10:39:57.693355 OrthancInitialization.cpp:114] Reading the configuration from: "Configuration\dicomweb.json"
W1205 10:39:57.694355 OrthancInitialization.cpp:114] Reading the configuration from: "Configuration\orthanc.json"
W1205 10:39:57.699355 OrthancInitialization.cpp:114] Reading the configuration from: "Configuration\postgresql.json"
W1205 10:39:57.699355 OrthancInitialization.cpp:114] Reading the configuration from: "Configuration\serve-folders.json"
W1205 10:39:57.699355 OrthancInitialization.cpp:114] Reading the configuration from: "Configuration\webviewer.json"
W1205 10:39:57.700355 OrthancInitialization.cpp:114] Reading the configuration from: "Configuration\worklists.json"
W1205 10:39:57.701355 FromDcmtkBridge.cpp:199] Loading the embedded dictionaries
W1205 10:39:57.763355 FromDcmtkBridge.cpp:2075] Registering JPEG Lossless codecs in DCMTK
W1205 10:39:57.763355 FromDcmtkBridge.cpp:2080] Registering JPEG codecs in DCMTK
W1205 10:39:57.770355 main.cpp:670] Loading plugin(s) from: Configuration\../Plugins/
W1205 10:39:57.772355 PluginsManager.cpp:269] Registering plugin 'worklists' (version 1.3.1)
W1205 10:39:57.772355 PluginsManager.cpp:168] Sample worklist plugin is initializing
W1205 10:39:57.773355 PluginsManager.cpp:168] Worklist server is disabled by the configuration file
W1205 10:39:57.787355 PluginsManager.cpp:269] Registering plugin 'dicom-web' (version 0.4)
W1205 10:39:57.788355 PluginsManager.cpp:168] URI to the DICOMweb REST API: /dicom-web/
W1205 10:39:57.788355 PluginsManager.cpp:168] URI to the WADO-URI API: /wado
W1205 10:39:57.791355 PluginsManager.cpp:269] Registering plugin 'postgresql-index' (version 2.0)
W1205 10:39:57.791355 PluginsManager.cpp:168] The PostgreSQL index is currently disabled, set "EnableIndex" to "true" in the "PostgreSQL" section of the configuration file of Orthanc
W1205 10:39:57.793355 PluginsManager.cpp:269] Registering plugin 'postgresql-storage' (version 2.0)
W1205 10:39:57.793355 PluginsManager.cpp:168] The PostgreSQL storage area is currently disabled, set "EnableStorage" to "true" in the "PostgreSQL" section of the configuration file of Orthanc
W1205 10:39:57.807355 PluginsManager.cpp:269] Registering plugin 'web-viewer' (version 2.3)
W1205 10:39:57.807355 PluginsManager.cpp:168] Initializing the Web viewer
W1205 10:39:57.807355 PluginsManager.cpp:168] Web viewer using 4 threads for the decoding of the DICOM images
W1205 10:39:57.807355 PluginsManager.cpp:168] Storing the cache of the Web viewer in folder: \\server01.company.corp\orthanc$\Orthanc\WebViewerCache
W1205 10:39:57.963355 PluginsManager.cpp:168] Web viewer using a cache of 100 MB
W1205 10:39:57.963355 PluginsManager.cpp:168] Using GDCM instead of the DICOM decoder that is built in Orthanc
W1205 10:39:57.967355 PluginsManager.cpp:269] Registering plugin 'wsi' (version 0.4)
W1205 10:39:57.967355 PluginsManager.cpp:168] The whole-slide imaging plugin will use at most 8 threads to transcode the tiles
W1205 10:39:58.001355 PluginsManager.cpp:269] Registering plugin 'osimis-web-viewer' (version 1.0.1.1-cafbfc1)
W1205 10:39:58.001355 PluginsManager.cpp:168] Initializing the Web viewer
W1205 10:39:58.001355 PluginsManager.cpp:168] Using GDCM instead of the DICOM decoder that is built in Orthanc
W1205 10:39:58.003355 PluginsManager.cpp:269] Registering plugin 'serve-folders' (version 1.3.1)
W1205 10:39:58.003355 PluginsManager.cpp:168] ServeFolders: Empty configuration file: No additional folder will be served!
W1205 10:39:58.003355 OrthancInitialization.cpp:998] SQLite index directory: "\\server01.company.corp\orthanc$\Orthanc\"
W1205 10:39:58.061355 OrthancInitialization.cpp:1068] Storage directory: "\\server01.company.corp\orthanc$\Orthanc\"
W1205 10:39:58.121355 HttpClient.cpp:686] HTTPS will use the CA certificates from this file: Configuration
W1205 10:39:58.132355 ServerScheduler.cpp:135] The server scheduler has started
W1205 10:39:58.133355 LuaContext.cpp:103] Lua says: Lua toolbox installed
W1205 10:39:58.133355 ServerContext.cpp:182] Disk compression is disabled
W1205 10:39:58.133355 ServerIndex.cpp:1403] No limit on the number of stored patients
W1205 10:39:58.133355 ServerIndex.cpp:1420] No limit on the size of the storage area
W1205 10:39:58.328355 main.cpp:862] DICOM server listening with AET ORTHANC on port: 4242
W1205 10:39:58.328355 MongooseServer.cpp:1075] HTTP compression is enabled
W1205 10:39:58.331355 main.cpp:795] HTTP server listening on port: 8042
W1205 10:39:58.331355 main.cpp:682] Orthanc has started