Microsoft Graph Get the number of the resource
GET /communications/onlineMeetingConversations/{onlineMeetingEngagementConversation-id}/messages/{engagementConversationMessage-id}/reactions/$count for Microsoft Graph Communications.
GET /communications/onlineMeetingConversations/{onlineMeetingEngagementConversation-id}/messages/{engagementConversationMessage-id}/reactions/$count for Microsoft Graph Communications.