CmdID / PowerShell / Cmdlets / Get
Get-MailboxSpellingConfiguration
Use the Get-MailboxSpellingConfiguration cmdlet to retrieve the Outlook on the web spelling checker settings of a specified user. Exchange PowerShell reference
From the Exchange PowerShell reference 2 parameters Its page in the reference
Parameters
-IdentityThe Identity parameter specifies the mailbox that you want to view.-DomainControllerThe DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory.