Hi @Iniobong Nkanga ,
Welcome to the Microsoft Q&A platform!
Based on your description, I understand you want to get a report of email address other admins has set to receive notification.
You could try to run the command below in PowerShell and get the result as screenshot below.
Get-Mailbox | Where-Object {$.RecipientTypeDetails -eq 'UserMailbox' -and $.RoleAssignmentPolicy -ne $null} | Select-Object DisplayName,PrimarySmtpAddress,ForwardingSmtpAddress
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