4. OneDrive

11. mailbox.makeEwsRequest( ); Message forwarded by ExchangeEndpoint retrieves attachments App in Outlook

13. Outlook APP Exchange App Backend App requests attachment metadata, callback token and EWS URL via JS APIs

14. Outlook APP Exchange App Backend App passes attachment id, token and EWS URL to its backend

15. Outlook APP Exchange App Backend App backend calls EWS to get attachment

19. Outlook APP Launch OAuth Azure AD App Backend SP

20. Outlook APP Launch OAuth App’s redirect html page App Backend SP

21. Outlook APP Launch OAuth App’s redirect html page App Backend SP

22. Outlook APP Launch OAuth App Backend SP Azure AD 1. Exchange for refresh and access token 2. Call SP with access token

31. User Identity Token Make EWS requests Settings User Profile

32. Get/set/add recipients or attendees Get/set the subject

33. Add file or item attachments

34. Prepend to the body Overwrite current selection in body

35. Get/set start or end time Get/set location Get/set/add attendees

36. Saved on the sent item Can be used to mark a composed message (eg “Tracked” in CRM)

37. ReadWriteMailbox ReadWriteItem ReadItem Restricted

40. Book Workspace Address Book Bob Costas Jane Smith John Doe

42. Newsletter Approval Select documents for approval: