Keep getting Error Code 17193 "Attachment too large" on email that's deleted and invisible

I contacted Outlook Support for Mac as you suggested. These are the directions they sent me which worked. I'm posting them here for anyone else who may run across this problem:

If the Outbox is not showing on your application, please. follow the steps below to enable the Outbox.

• Open Outlook make it 'Work Offline' (by navigating to Outlook menu bar> Outlook> Work Offline).

• Quit and restart Outlook. (Now there would be no active connection to the server)

• Send a test email to yourself (This email will get stuck in Outbox as Outlook is Offline).

• Go to the Outbox folder and delete all the emails in it. (Note: Move important emails to 'Drafts')

• Now switch to 'Work Online' and try sending a test email to yourself.

If issue persists, even after clearing Outbox folder and the trash folder. Let’s search for the attachment in Outlook and delete them. To do so refer to the steps below:

1. Tap on the Outlook Search bar
2. The search ribbon opens up
3. Click on attachments --> greater than 10 MB
4. This will open up a search bar. In that change the size from 10000 to 30000 (depending on your attachment size).
5. In the search ribbon change the selection to "All Mail" - 4th button from top left in the ribbon
6. Check if it shows the email which is listed on the sync error window were you see error details and delete it and empty trash folder. (Search for email with subject 'Shown in the sync error window'’).

If you still face the same issue, try searching the email using advanced search in Outlook application and check if that helps locating the email causing the issue.

Click on Search tab> Select 'Advanced', query should 'Subject' - 'Contains' ---> 'Subject 'Shown in the sync error window', click on the '+' icon, size - 'is greater than' -- '10000' and the list will be listed below, search for the email again and delete it. Make sure that the email is completely removed from the application as well as the computer.

Thank you for your prompt response and suggestions.

Hello,

I have the same problem and none of the solution proposed above works.

I do not use Microsoft Exchange on my computer, by my website hosting service uses MX Plan.

From what I understand, since the message exceeds the size limit, it is not even saved in Drafts or Outbox, this is why it is impossible to find? And I have no "clear cache" options.

Below are the technical specs that I could find in the error log from Outlook:

Outlook for Mac 2021 Build: 16.66.22101101
Activation Type: Perpetual
License Type: Retail License 2019
Activation Domain: hotmail.com
App Store SKU: FALSE
Microsoft AutoUpdate Build: 4.55.23010700
Mac OS Version: Version 10.15.7 (Build 19H2026)

Many thanks in advance for looking into this.

Regards,

Dear AleciaSR,

Thank you for raising your concern in this community.

* Initially, you can try to clear the cache to see if it makes any difference.

• You can refer to this article for the procedure Clear the cache in Outlook for Mac (microsoft.com).

* Furthermore, kindly create one another Outlook for Mac profile and see if it gives any different result. | Manage profiles or identities in Outlook for Mac - Microsoft Support |.

On the other hand, I would like to share some information with you, in order of your scenario, as we have specific support channel resources for Outlook for Mac related certain scenario, so would you mind to contacting and sharing this experience directly to our Outlook for Mac support team? Our relevant support team can further check from their side and do some changes from their side.

Here is official document: Contact support within Outlook for Mac - Microsoft Support

I would really appreciate your precious time and kind cooperation.

Stay safe and healthy.

Have a good day.

Sincerely,

Darpan