Calendar Plugin - visibility of Invite reply messages

[ptalke]

Hi,

I am running Kolab 16 with Roundcube 1.2.5-8.1.el7.kolab_16 on Centos 7.
When I receive an Invite and accept the Invite, there is the Option to provide a comment to the accept message.
How is it possible to see the comment afterwards?
The accept-message is not stored in the "Sent" folder as I am used to in Exchange/Outlook
Is there any way to see the content of my Accept message after I have sent it?

Thanks in advance and regards
Peter