How to report phishing emails when we dont have email header file and images

Hi Team,

I wanted to report [Moderator Note: Personal Info Removed]@spiceimporter.com, where the sender is impersonating an organization and sending fraudulent emails.

We are currently reporting these cases to ******@outlook.com because the domain uses Microsoft/Outlook mail exchange infrastructure. However, we have not been receiving responses or seeing action on the reported emails, even when we provide clear supporting evidence.

Since these reports are being submitted to us by our customers, we want to make sure we are using the correct Microsoft/Outlook abuse escalation process to report the malicious sender and request suspension or other appropriate action.

Could you please advise:

• What is the recommended way for a third party/brand-protection team to report a malicious email directly to Microsoft for investigation?
• Is there a dedicated Microsoft abuse/phishing submission portal or escalation channel for full email/header-based reports?
• Can we submit the original email or .eml/header file as evidence and request action against the associated mailbox/domain?
• Is ******@outlook.com still the appropriate channel for these types of reports, or is there a newer/recommended process?

We are specifically looking for the Microsoft-side reporting/escalation process, rather than the standard Outlook user reporting workflow.