Invitation attachment not visible in calendar

[jdpipe]

Your environment

Thunderbird 91 on Ubuntu 18.04 :-)
TbSync 3.0.2
Provider for Exchange ActiveSync 2.0.1 (the latest, AFAICT)

Expected behavior

Receiving invitations to events, there are attachments in the email. When I accept the invitation (which I do via office.com, because EAS-4-TbSync is not reliable in sending acceptance notifications), the event appears in my calendar in Thunderbird. However, the event does not have any attachment shown. The attachment is visible in my calendar when looking at office.com.

Actual behavior

Attachment is not visible anywhere in the Thunderbird calendar. It seems that the Thunderbird interface doesn't really support attachments, perhaps?

Perhaps a workaround would be to include text in the event description to alert the user to the fact that there are attachments which cannot be displayed...?

Steps to reproduce

As above.

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