Hi, @Iniobong Nkanga
Based on your description, I understand that you want to recover deleted messages.
1.Messages are not deleted immediately after they are removed from the deleted folder, and you can view the Recoverable Items folder.
2.If you want to store messages in a separate folder, you can try using transport rules to manage them. For details, please refer to it
Manage mail flow rules in Exchange Online | Microsoft Learn
3.Considering that you can view emails deleted on July 5, the time period has exceeded the default retention time of 14 days, so you may have modified the retention time of deleted emails. You can use the following command to view the retention time, after which the client cannot view and cannot recover the deleted files.
Get-Mailbox -Identity "******@domain.com" | Select-Object -ExpandProperty RetainDeletedItemsFor
4.Admins can recover deleted emails in a user's mailbox.
More information can be found Recover deleted messages in a user's mailbox in Exchange Online | Microsoft Learn
Recover and restore deleted items in Outlook - Microsoft Support
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