CmdID

CmdID / PowerShell / Cmdlets / Disable

Disable-IPv6ForAcceptedDomain

Use the Disable-IPv6ForAcceptedDomain cmdlet to disable or opt-out of support for mail delivery to accepted domains in Exchange Online using IPv6. Exchange PowerShell reference

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

Opens CmdID with your command, read as PowerShell. It is read in your browser and sent nowhere.

Parameters

3 in the Exchange PowerShell reference
-DomainThe Domain parameter specifies the accepted domain that you want to disable mail delivery using IPv6 for.
-Confirm, -cfThis parameter is reserved for internal Microsoft use.
-WhatIf, -wiThis parameter is reserved for internal Microsoft use.