Is it possible to use the data from Office 365 as the data source of Azure Cognitive Search (Azure Search)? We want to use Azure Cognitive search, but the data source is from Office 365 (Pro Plus). Azure Cognitive Search (https://docs.microsoft.com/en-us/azure/search/cognitive-search-concept-intro) mentions that the data must exist in an Azure data storage service. I think there might be a way to get the data from Office 365.
Besides, a potential solution is to use Microsoft flow. https://techcommunity.microsoft.com/t5/Yammer-Resources/Identify-sentiment-of-comments-in-a-Yammer-group-by-using-Azure/ta-p/393398)