Add initial Microsoft Teams support

Documentation on https://github.com/42wim/matterbridge/wiki/MS-Teams-setup

vendor/github.com/yaegashi/msgraph.go/beta/MailboxUsageMailboxCountsModel.go

@@ -0,0 +1,21 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+import "time"
+
+// MailboxUsageMailboxCounts undocumented
+type MailboxUsageMailboxCounts struct {
+	// Entity is the base model of MailboxUsageMailboxCounts
+	Entity
+	// ReportRefreshDate undocumented
+	ReportRefreshDate *time.Time `json:"reportRefreshDate,omitempty"`
+	// Total undocumented
+	Total *int `json:"total,omitempty"`
+	// Active undocumented
+	Active *int `json:"active,omitempty"`
+	// ReportDate undocumented
+	ReportDate *time.Time `json:"reportDate,omitempty"`
+	// ReportPeriod undocumented
+	ReportPeriod *string `json:"reportPeriod,omitempty"`
+}