Email attachment not saving correctly - powershell

Question

Every morning I have an email that automatically generates, and withing the email is a CSV attachment. This is what I have so far:
$outlook = New-Object -ComObject Outlook.Application
$namespace = $outlook.GetNamespace("MAPI")
# Below: 6 is the default for inbox, so this saves the user from having to
# select the inbox folder. Change if emails w/ attatchements are going to a
# different folder
$folder = $namespace.GetDefaultFolder(6)
$filepath = "I:\PowerShell"
$folder.Items | foreach {
$_.attachments | foreach {
$filename = $_.filename
if ($filename.Contains("example.csv")) {
$_.SaveAsFile((Join-Path $filepath $filename))
Rename-Item -LiteralPath '.\example.csv' -NewName "Server.csv" -Force
}
}
}
When I run this the first time, it successfully grabs the attachment from the email, saves the attachment to the designated folder, and renames it to "Server.csv". However, when I run this a second time, it will grab the attachment and save it, however it will not rename/overwrite it as "Server.csv", so it will only save it as example.csv. It will sometimes throw an error saying
Rename-Item : Cannot create a file when that file already exists
However, I have -Force there, so I'm not sure why that is happening.
Any advice?

Answer 1

-Force allows you to rename a file that is hidden or read-only. It does not allow you to rename a file to replace an existing file. Check if the destination file already exists, and remove it if it does. Then save the attachment directly with the desired filename.
$outfile = Join-Path $filepath 'Server.csv'
if (Test-Path -LiteralPath $outfile) {
Remove-Item $outfile -Force
}
$_.SaveAsFile($outfile)