Get the List of LMS Occurrences that have been created or modified since a date. 

These are occurrences that are flagged as LMS occurrences, and have been created or modified since a date. 

An Occurrence will be considered to be modified if it, or any of its classes, units or prices, have been created or modified. 

Each Occurrences is represented by a TOccu. The collection of Occurrences is represented by a List of TOccu. 

A token is passed for authentication. If the authentication fails, or other errors occur, no occurrences are returned. The result of the authentication is represented by a TAuthenticate object. 

Requires a valid registration key entry for the Short Courses feature. 

This function has security level "Protected", and can only be accessed by users that have explicitly been granted permission to the API.

[WebMethod(Description = "Gets a list of occurrences that have been flagged for LMS that have been added or modified since a date")]
public TAuthOccuList GetLMSOccurrencesSince(string token, DateTime sinceDate);