Only until Microsoft Outlook has synchronized with the mailbox, that the most up to date data will be displayed to the user.
You can confirm if Sent Items Update has updated the sent item or if Microsoft Outlook is displaying out of date data by logging into the user’s mailbox using Outlook Web Access.
A Microsoft Outlook Most Valuable Professional (MVP) since 1999, Diane is the author of several books, including Outlook 2013 Absolute Beginners Book.She also created video training CDs and online training classes for Microsoft Outlook.Gmail's Sent Mail folder is under the [Gmail] folder in your folder list.Other IMAP servers may use a similar configuration.By default, Outlook 2010 creates a separate data file for each email account, with separate Inbox, Drafts, Sent Items folders.
The messages you send using each account are placed in the Sent Items folder in the data file associated with the account, not in one main sent folder.
The way it should work is as simple as this: When you add your mail account to your mail program, it should automatically configure your Sent folder in this manner.
However, in some cases, such as old versions of Apple Mail, it will automatically use a folder called "Sent Messages" instead of "Sent." In other cases, your mail program will default to storing your sent messages locally rather than on the server, meaning you won't have access to them on any other device.
I have checked the options and the necessary check-boxes have been checked For most people, the sent messages are being saved correctly but not in the folder where they expected the sent item to be.
Outlook 2010 (and up) changes how accounts are handled and Sent items are stored in the account's data file.
First, check your options and verify you are saving sent items.