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Get-TenantAllowBlockListSpoofItems

Use the Get-TenantAllowBlockListSpoofItems cmdlet to view spoofed sender entries in the Tenant Allow/Block List. Exchange PowerShell reference

From the Exchange PowerShell reference 3 parameters Its page in the reference

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Parameters

3 in the Exchange PowerShell reference
-IdentityThe Identity parameter is available but isn't used.
-ActionThe Action parameter filters the results by action type.
-SpoofTypeThe SpoofType parameter filters the results by spoof type.