How do I change a file's attribute using Powershell?

Question

I have a Powershell script that copies files from one location to another. Once the copy is complete I want to clear the Archive attribute on the files in the source location t

Answer 1

As the Attributes is basically a bitmask field, you need to be sure clear the archive field while leaving the rest alone:

PS C:\> $f = get-item C:\Archives.pst
PS C:\> $f.Attributes
Archive, NotContentIndexed
PS C:\> $f.Attributes = $f.Attributes -band (-bnot [System.IO.FileAttributes]::Archive)
PS C:\> $f.Attributes
NotContentIndexed
PS H:\>