User is not getting email notification for PO approval but he is getting bell notification.

Summary:

One user is not getting email notification for PO approval, but he is getting bell notification. How can we troubleshoot and fix the rootcause

Content (please ensure you mask any confidential information):

One user is not getting email notification for PO approval, but he is getting bell notification. How can we troubleshoot and fix the rootcause

For other users, notifications are working fine.

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