Outlook for MAC is not syncing sent folder for IMAP account

Dear BKH33AL，

Thanks for choosing Microsoft community!

I have read your question carefully and done some research, please kindly refer to following suggestions:

I suggest you log into your account with your browser (put Outlook into work off line) and clean up your folders. You might be better off delete Exchange account so it deletes the cache files in Outlook then add account back after you have cleaned up.
Exchange Basics: The Inbox syncs more frequently than any other and should be kept as clean as possible. (this is the number one cause of problems with sync). Do not make subfolders under the Inbox. Any folder with more than a few thousand messages is going to take some time to fully come down when you first sync your account. Due to the design of Outlook's sync engine (and how exchange works), you will see the 512 newest messages in a folder at the initial start of sync then the rest of the folder's contents will be back filled before you see any mail that arrives after this point. This is why it will look like you are not getting new mail when a folder is still going through initial sync. This is also further exacerbated by an Exchange issue where it gets unnecessary change events before the newer mail arrives. If you carefully watch the progress during the sync of a folder with greater than a couple thousand messages, you will see "Updating local..." a lot before the newer mail starts arriving. Outlook checks the server for updates every minute, any folder that has updates will subsequently be synced. Since Outlook has a limit on how many folders can be synced at a time, there can be a queue of folders waiting. The Inbox does get high priority so it will generally sync before other folders that also need to sync.

If problem persists, to save your time and help you better, please try to connect outlook for Mac support. There will be a professional outlook for Mac technician there to help you. Please refer to this article: Contact support within Outlook for Mac (microsoft.com)

Hope this help you, if there is any deviation in my understanding, please forgive me and provide me with more details. I am more than happy to continue to help you. I wish you a smooth new year and all the best!

Best regards,

Kerry

Thank you, for your thorough response.

I contacted the support through Chat. The email account in issue is set up using IMAP set up in the Outlook app. It appears the issue is a known issue. If there is someone who is experiencing the same issue, below is what I received from Support.

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Thank you for the information. The above behavior is identified as a bug with IMAP accounts where the sent folder does not synchronize with the webmail and a report is already filed with our engineering team who is working on the same with High priority. We do not have an ETA for the same at the moment. Please keep Outlook updated all the time to receive the fixes as and when available. You may refer to the link below for release notes to know about the fixes and features included in every update in Outlook.

https://support.microsoft.com/en-us/office/outlook-for-mac-release-notes-for-beta-channel-builds-d6347358-5613-433e-a49e-a9a0e8e0462a Hope this information helps. As a workaround, you may switch to the classic version and that should work. Please let us know if you have any further questions. Thank you.

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Hello,

I have the exact same problem with the new outlook interface, the thing is if i switch to the older interface the sent folder syncs but i can't see the sent emails that were sent during the new interface cause they aren't on the webmail server. Is there a solution to this? I can't afford to loose two weeks of sent emails!

I understand it is a bug but this is a very important function that is not working and after almost 2 weeks there is no update on the application to fix this bug.

Is there an update for the fix?

Thanks in advance

Has this been resolved yet?

I have the same problem:

Emails sent on Outlook for iPhone connected to the third party IMAP server appear in the sent folder on the phone and on the sent folder of the third-party server and on the sent folder of Outlook for Mac.

But emails sent on Outlook for Mac connected to the same third party IMAP server only appear in the sent box of Outlook for Mac, and do not appear on the sent box of the third party server, nor in the sent box of Outlook for iPhone.

In other words, when it comes to sent mail, Outlook for IPhone mirrors the third party server just fine. Outlook for Mac for some reason does not.

I have the same issue. Does anyone from Microsoft is working to fix it? We use outlook for work, not for fun and we cannot lose sent emails.