Yes, `message_id` is searchable field in Exchange Email. It is possible to query emails via message_id in `Search Email` action of Exchange v4.2.1 connector. You can use message_id if you want to retrieve a specific message or you can use message_id__in to specify multiple message ids.
example:
If you used Basic Query:
{
"message_id": "<message__id>"
}
or
{
"message_id__in": ["<message__id1>", "<message__id1"]
}
If you used Advanced Query:
Q(message_id__in=['<id1>', '<id2>'])
Note: Any version prior to 4.2.1 does not support advanced query.
