\**\
This pattern is often used in Copy Task for recursive folder tree traversal. Basically it means that all files with extension config
would be processed from the all subdirectories of $(Services_Jobs_Drop_Path)
path.
MSDN, Using Wildcards to Specify Items:
You can use the **, *, and ? wildcard characters to specify a group of
files as inputs for a build instead of listing each file separately.
- The ? wildcard character matches a single character.
- The * wildcard character matches zero or more characters.
- The ** wildcard character sequence matches a partial path.
MSDN, Specifying Inputs with Wildcards
To include all .jpg files in the Images directory and subdirectories
Use the following Include attribute:Include=”Images\**\*.jpg”