Windows Managed account to report subscription file share

Is it possible to used a Windows Managed account to access a file share in a Report subscription? When creating a Windows file share report subscription, on Step 4 - Create a data-driven subscription, I must specify the Username and Password of the account which has access to the file share. Can this be a Windows Managed Account and if so, what do I specify for the password to get the field to validate and allow me to move to the next screen?