how can you upload files to an Azure Web Apps virtual directory ?
I created a virtual directory for example called \\UAT but when i log on via ftp its not visible ?
You can set the FTP credentials on the Deployment credentials blade within your App Service:
However, the easiest way is to upload your files using the KUDU console. To access the console navigate to https:// where is the name of your App
In the Kudu console, click on the Debug Console tab, then on PowerShell. That will open a file browser where you can navigate to your directory and upload the files: