[office-js-preview] (Outlook) Don't call append in on send (#46618)
[office-js-preview] (Outlook) Don't call append in on send (#46618)

* [office-js-preview] (Outlook) Don't call append in on send

* Updates based on feedback

* Tag as important
markogresak/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,mcliment/DefinitelyTyped,georgemarshall/DefinitelyTyped