Syncing EWS UpdateItem Changes to Compose Pane in Exchange On-Prem Outlook Add-in (Office JS ≤ 1.5)

[backupsdkjjdie]

I am developing an Outlook add-in for Exchange On-Premise accounts using Office JS. However, since Exchange On-Prem only supports Office JS versions ≤ 1.5, many Office JS APIs are unavailable for certain tasks. As a workaround, I’m using the EWS API to perform operations like adding attachments to an email, and I trigger this EWS API call using Office.context.mailbox.makeEwsRequestAsync. While I receive a successful response from the EWS API, indicating that the changes are applied on the Exchange server, the updates are not reflected in the Outlook compose pane UI. For example, when using the UpdateItem API to add attachments, the attachments are successfully added on the server, but they do not appear in the compose pane. Is there a way to sync or refresh the compose pane after performing operations like UpdateItem in EWS so that changes, such as attachments, are immediately visible in the UI? Any suggestions or workarounds would be greatly appreciated.

[Oleg-O]

Unfortunately, no, there is no way to force sync or refresh. This is one of the reasons we've been adding more capabilities in the JS API in compose so that add-in developers wouldn't have to deal with this kind of issues. But new JS APIs are only available online.