troubleshooting Question

Email security isues

DARSHAN DIORAFlag for India asked on
Security* 0ffice 365
10 Comments2 Solutions26 ViewsLast Modified:
We are using Microsoft 365 - Outlook.
Recently we are facing issues like email send from many of customers are seems to be from different email users may be hacker.
Like earlier original mail from one customer  and now i checked its from when we send proforma invoice to our customer they receive with different  bank details than us due to this same one of customer transferred the payment to this fraudster. How can we resolve this.

Best Regartds
Senior CyberSecurity Engineer

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