Moving Proofpoint Allow / Block lists into Microsoft Exchange

Important: Beginning August 13, 2025, CWU will replace Proofpoint with Microsoft Defender for email protection.

Users must manually transfer any custom Safe or Blocked Senders lists from Proofpoint to Microsoft Exchange to avoid disruption in sending or receiving messages following changes.

 

Summary

 

This guide explains how to manually transfer your allow/block lists from the Proofpoint to Microsoft Exchange.

 

 

Manually Transfer Allow/Block Lists from Proofpoint to Microsoft Exchange

 

  1. Open both portals side by side and log in:

You will use your CWU credentials to log into both portals.

 

  1. In the lower-left corner of the Proofpoint window, click Lists, then Blocked Senders List to view your saved Blocked Senders.

 

  1. In the Exchange Admin Center, go to Blocked Senders.

 

  1. Click the blue plus + icon to add addresses manually.

 

  1. Copy and paste all addresses from Proofpoint into the the Blocked Senders list.

     
  2. Repeat the steps above for your Safe Senders list in Proofpoint and Exchange.

 

Blocked senders added in Proofpoint (left) and Exchange admin center (right).
Copy and paste blocked senders from Proofpoint to Microsoft Exchange.

 

 

Additional Resources

 

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