Users may experience an error with the service throwing an error stating there is a Logon Failure.  The details of the logon failure may be one of the following or another specific type of logon failure:

• Logon Failure: The target account name is incorrect.
• Logon failure: the specified account password has expired.
• Logon failure: unknown user name or bad password.

This error can be seen on a ShadowLink delivery method via the Services Screen > Delivery Method > Message field.  See this article for accessing that page: Checking Status of ShadowLink Services

To resolve the issue, update the network account credentials used for the service to current and valid account credentials via the guide on this page: Using ShadowLink To Access Network File Systems