New-PublicFolderMigrationRequest is no longer a supported cmdlet to migrate legacy public folders. Please use the batch migration ...

New-PublicFolderMigrationRequest is no longer a supported cmdlet to migrate legacy public folders. Please use the batch migration process detailed at https://technet.microsoft.com/en-us/library/dn874017(v=exchg.150).aspx to migrate your legacy public folders to Exchange Online.