Cannot convert the literal 'undefined' to the expected type 'Edm.Guid'

If you get this error when working in Javascript with DynamicsCrm (or any system that uses Odata), and you get this error, then you most likely need to setup your object like this:

var request = {

    ObjectId: {guid: "E8C656B7-6AD1-E811-A967-000D3A30D5DB"}

};

Otherwise, the request that will get sent will have undefined value and the response will have an error with the following message:

message=An error occurred while validating input parameters: Microsoft.OData.ODataException: Cannot convert the literal 'undefined' to the expected type 'Edm.Guid'. ---> System.FormatException: Guid should contain 32 digits with 4 dashes (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx).