I've constructed the query below on Graph Explorer and got no messages in reply. My query.
https://graph.microsoft.com/v1.0/me/mailFolders('Inbox')/messages?$filter=subject eq '' and contains(body/content, '***')&$top=10
Do I understand correctly that a construct like 'contains(body/content, '')' verifies that the body contains the object I specified? And the whole body of the object shouldn't just consist of it?
Sourced from https://github.com/microsoftgraph/msgraph-sdk-dotnet/issues/1079