CmdID / PowerShell / Cmdlets / Get
Get-LinkedUser
Use the Get-LinkedUser cmdlet to view existing linked user accounts. Exchange PowerShell reference
From the Exchange PowerShell reference 6 parameters Its page in the reference
Parameters
-IdentityThe Identity parameter specifies the linked user that you want to view.-AnrThe Anr parameter specifies a string on which to perform an ambiguous name resolution (ANR) search.-FilterThe Filter parameter uses OPATH syntax to filter the results by the specified properties and values.-OrganizationalUnitThis parameter is reserved for internal Microsoft use.-ResultSizeThe ResultSize parameter specifies the maximum number of results to return.-SortByThe SortBy parameter specifies the property to sort the results by.