In Exchange on-premises environments, your mail add-in can get the `CustomProperties` MAPI-based extended property using the EWS [GetItem](/exchange/client-developer ...
title Outlook add-in API requirement set 1.1 description Lists the APIs introduced in Mailbox requirement set 1.1 for Outlook add-ins. The Outlook add-in API subset ...
When the JavaScript function specified in the manifest to handle an event runs, code in Office.onReady () and Office.initialize isn't run. We recommend adding any startup logic needed by the event ...