Case number <PII removed> - I am still receiving multiple emails with the same description

Please note that our forum is a public platform, and I modified your question to hide your personal information in the description. Kindly ensure that you hide any personal or organizational information the next time you post an error or other details to protect personal data. 

Hello John Campbell,

Please note that this is a user-to-user forum, so contributors here cannot access Microsoft Support cases, your mailbox, or Outlook mobile diagnostic logs.

Since you already have a support case number and the same issue is still happening, the best next step is to follow up with Microsoft Support again and provide the same case number. This will help them continue from the existing case history rather than starting the investigation from the beginning.

For Outlook for iOS, please open the Outlook app, tap your profile picture or account menu, tap the ? icon, then select Contact Outlook Mobile Support. In your message, include that you are still receiving multiple emails with the same description and provide the previous case number. Reference: Get in-app help for Outlook for iOS and Android | Microsoft Support 

I hope this helps clarify the next step.