Why #EXT# is seen in the username? 

Why #EXT# is seen in the username? 

• Prisma Access
• Cloud Identity Engine (CIE)

1. The #EXT# is actually an identifier that Microsoft uses to differentiate tenants from guest users.
2. Example: User bob@example.com, from directory example, is added as an external user in directory testdomain. This results as a user in testdomain with UPN bob_example.com#EXT#@testdomain.onmicrosoft.com.
3. Refer to Microsoft- User Principal Name and Ext.
4. The above is normal and CIE accepts this username and syncs with the firewall as well.