If an Exchange or Office 365 user sends a Calendar invite (meeting request) to a GroupWise user, via Coexistence Manager for GroupWise (CMG) the text of the request is received as Plain Text.
The problem occurs when the request originates from either OWA, or Outlook.
This issue can resolved by:
For Shared domains in Exchange or Office 365, TNEF Format must be disabled for remote domains, see this Microsoft help page:
For contacts, run the command:
set-mailcontact "[Alias of Contact]" -UseMapiRichTextFormat Never
This link provides further information on this setting:
Please note that Quest Support is not responsible for third party content referenced in this Solution and this information is provided to assist in troubleshooting this issue and we recommend testing any settings before applying to a production environment.