Outlook ICS description being overridden

Hi there,

I'm sending emails with ICS attachments. And facing problems like: Outlook does replace my DESCRIPTION/X-ALT-DESC by the email content automaticaly. So Outlook does create Calendar event automaticaly based on .ICS attachment BUT REPLACE/OVERRIDE the DESCRIPTION.

Expected behaviour: Show original DESCRIPTION/X-ALT-DESC from .ICS attachment. When automatic Calendar event created.

Current behaviour: Override .ICS DESCRIPTION/X-ALT-DESC by shortened unformatted email body.

Questions:

1 - Is there a way to do what is expected by adding some X-MICROSOFT** flags to the .ICS?

2 - Is there a way to do what is expected by Outlook/Calendar client config?

Note: 

• I've already tried to specify X-ALT-DESC instead/together with DESCRIPTION
• ICS file is valid and being consumed well by othe Calendar client (google e.t.c). No overrides.