DFS Replication in Windows Server 2012 R2: Restoring Conflicted, Deleted and PreExisting files with Windows PowerShell

Getting this :

PS C:\Users\sushil> Restore-DfsrPreservedFiles -Path "D:\Secretaryoffice\DfsrPrivate\PreExistingManifest.xml" -RestoreTo
Path "D:\SECdata" -CopyFiles -AllowClobber -Verbose
Restore-DfsrPreservedFiles : Could not find the specified manifest file:
"D:\Secretaryoffice\DfsrPrivate\PreExistingManifest.xml"
At line:1 char:1
+ Restore-DfsrPreservedFiles -Path "D:\Secretaryoffice\DfsrPrivate\PreExistingMani ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (:) [Restore-DfsrPreservedFiles], DfsrException
+ FullyQualifiedErrorId : Restore-DfsrPreservedFiles.ManifestNotFound,Microsoft.DistributedFileSystemReplication.C
ommands.RestoreDfsrPreservedFilesCommand

VERBOSE: Loading preserved file manifest: "D:\Secretaryoffice\DfsrPrivate\PreExistingManifest.xml"
Restore-DfsrPreservedFiles : Access to the path 'D:\Secretaryoffice\DfsrPrivate\PreExistingManifest.xml' is denied.
At line:1 char:1
+ Restore-DfsrPreservedFiles -Path "D:\Secretaryoffice\DfsrPrivate\PreExistingMani ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Restore-DfsrPreservedFiles], UnauthorizedAccessException
+ FullyQualifiedErrorId : System.UnauthorizedAccessException,Microsoft.DistributedFileSystemReplication.Commands.R
estoreDfsrPreservedFilesCommand