Hello.
I would like to search for a Japanese email title or body that contains a number and a string without spaces, such as "2ken", "4ken", and "6ken", and only those that contain "2".
I think I need to use $search to search for body, but I could not get "2ken" in the following query.
https://graph.microsoft.com/v1.0/me/messages?$search="2"
Is there any documentation on searching for these words? Also, is this a specification?

