Outlook web add-in: attachment id is malformed after Oct 2020 Mac update
Received an update on Outlook for Mac this morning. 19th Oct, 2020 and since, IMAP emails with attachments is having issues downloading them via our add-in.
Looked up the issue and we are getting Id is malformed. This did not happen before the update. On further inspecting, found that the restUrl is empty in Office.context.mailbox and when this happens, we fallback to ewsUrl, which is great because we have a fallback, but now EWS throws the mailformed Id error.
The Id now looks like id: "362{00000000-0000-0000-C842-010000000000}", I've got no idea what type of Id this is, it used to be a base64.
Are there change logs for this? or how do we deal with this Id if there is no RestUrl and EWS can't recognise this Id.
We have fixed the bug where restUrl was coming as empty and the fix should be available in next monthly build. Depending on the release channel a customer is on, getting an updated build can take anywhere from 4-8 weeks.