Add initial Microsoft Teams support

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

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

@@ -0,0 +1,33 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// MailTips undocumented
+type MailTips struct {
+	// Object is the base model of MailTips
+	Object
+	// EmailAddress undocumented
+	EmailAddress *EmailAddress `json:"emailAddress,omitempty"`
+	// AutomaticReplies undocumented
+	AutomaticReplies *AutomaticRepliesMailTips `json:"automaticReplies,omitempty"`
+	// MailboxFull undocumented
+	MailboxFull *bool `json:"mailboxFull,omitempty"`
+	// CustomMailTip undocumented
+	CustomMailTip *string `json:"customMailTip,omitempty"`
+	// ExternalMemberCount undocumented
+	ExternalMemberCount *int `json:"externalMemberCount,omitempty"`
+	// TotalMemberCount undocumented
+	TotalMemberCount *int `json:"totalMemberCount,omitempty"`
+	// DeliveryRestricted undocumented
+	DeliveryRestricted *bool `json:"deliveryRestricted,omitempty"`
+	// IsModerated undocumented
+	IsModerated *bool `json:"isModerated,omitempty"`
+	// RecipientScope undocumented
+	RecipientScope *RecipientScopeType `json:"recipientScope,omitempty"`
+	// RecipientSuggestions undocumented
+	RecipientSuggestions []Recipient `json:"recipientSuggestions,omitempty"`
+	// MaxMessageSize undocumented
+	MaxMessageSize *int `json:"maxMessageSize,omitempty"`
+	// Error undocumented
+	Error *MailTipsError `json:"error,omitempty"`
+}