The Appian folder names cannot contain any of the following characters: \\ / ; :

1. Windows also does not allow to have these special charactes in file name or folder name
2. In Appian there is one trick to change the document name (not folder) so that it can contain above special characters
3. Convert the document in base64 string and again reconvert it to document from base 64 string using 'Appian Document from Base64 String' smart service. and in the 'docName' input parameter of smart service give "Test\\/;:|?’><" as document name
4. Please find attached screen shots for more referance.
Note:-after downloading the document to local m/c it converts the special character in document name to ASCII code

1. Windows also does not allow to have these special charactes in file name or folder name
2. In Appian there is one trick to change the document name (not folder) so that it can contain above special characters
3. Convert the document in base64 string and again reconvert it to document from base 64 string using 'Appian Document from Base64 String' smart service. and in the 'docName' input parameter of smart service give "Test\\/;:|?’><" as document name
4. Please find attached screen shots for more referance.
Note:-after downloading the document to local m/c it converts the special character in document name to ASCII code