Updates for Mexican CFDI layout version 3.3 are available in Microsoft Dynamics 365 for Operations

1. Updated cTipoRelacion catalog to include new values 08 and 09;
2. Treatment for VAT tax for 0% rate and Exempt;
3. Introduction of new validation rules during invoice posting to avoid rejections in PAC;
4. Total withholding and discount tags are not reported now when the related amounts are 0.00;
5. New schema validation implementation.

Schema validation setup

1. Go to the Organization Administration > Document management > Document management parameters > File types.

2. Click Add button to include the schema XSD provided by the tax authorities (CFDI 33. xsd).

3. Select file type = XSD and introduce the related description.

4. Go to account receivable > Invoices > E-invoices > Electronic invoice parameters.

5. Press Attach button.

6. Then click New > File > Browse.

7. Select schema for CFDI from local machine. Repeat the step 6 to include the other schemas related with payment complement and foreign trade.

8. Close current form and return to Electronic invoice parameters form.
9. Enable validation against XML schema = Yes.
10. Select the schemas into the following fields:
    1. CFDI XML schema file
    2. CFDI Payment XML schema file
    3. Under Foreign Trade group, select CFDI XML schema file
11. Close the form. 

After this configuration, Microsoft Dynamics AX will validate the invoice transactions against the schema during Posting action.