One Drive_Backup

You cannot bypass the policy. ODFB is not designed to be a replacement for file shares or used as a backup solution. You can certainly try to use them as such, but dont expect them to function the same.

That being said, Microsoft is constantly improving on the list of unsupported chars and should also be making some changes around the path length soon.

What do I do with all of files that can't be upload.

She must be a solution.

Rename them?

Yes Vasil Michev,

I will rename millions of files.

Why didn't I think about it?

one could always use powershell to find and fix but it would no longer be a 'backup'

    function Check-IllegalCharacters ($Path, [switch]$Fix, [switch]$Verbose)
    {
     # http://get-spscripts.com/2011/11/use-powershell-to-check-for-illegal.html
        Write-Host Checking files in $Path, please wait...
        #Get all files and folders under the path specified
        $items = Get-ChildItem -Path $Path -Recurse
        foreach ($item in $items)
        {
            #Check if the item is a file or a folder
            if ($item.PSIsContainer) { $type = "Folder" }
            else { $type = "File" }
           
            #Report item has been found if verbose mode is selected
            if ($Verbose) { Write-Host Found a $type called $item.FullName }
           
            #Check if item name is 128 characters or more in length
            if ($item.Name.Length -gt 127)
            {
                Write-Host $type $item.Name is 128 characters or over and will need to be truncated -ForegroundColor Red
            }
            else
            {
                #Got this from http://powershell.com/cs/blogs/tips/archive/2011/05/20/finding-multiple-regex-matches.aspx
                $illegalChars = '[&{}~#%]'
                filter Matches($illegalChars)
                {
                    $item.Name | Select-String -AllMatches $illegalChars |
                    Select-Object -ExpandProperty Matches
                    Select-Object -ExpandProperty Values
                }
               
                #Replace illegal characters with legal characters where found
                $newFileName = $item.Name
                Matches $illegalChars | ForEach-Object {
                    Write-Host $type $item.FullName has the illegal character $_.Value -ForegroundColor Red
                    #These characters may be used on the file system but not SharePoint
                    if ($_.Value -match "&") { $newFileName = ($newFileName -replace "&", "and") }
                    if ($_.Value -match "{") { $newFileName = ($newFileName -replace "{", "(") }
                    if ($_.Value -match "}") { $newFileName = ($newFileName -replace "}", ")") }
                    if ($_.Value -match "~") { $newFileName = ($newFileName -replace "~", "-") }
                    if ($_.Value -match "#") { $newFileName = ($newFileName -replace "#", "") }
                    if ($_.Value -match "%") { $newFileName = ($newFileName -replace "%", "") }
                }
               
                #Check for start, end and double periods
                if ($newFileName.StartsWith(".")) { Write-Host $type $item.FullName starts with a period -ForegroundColor red }
                while ($newFileName.StartsWith(".")) { $newFileName = $newFileName.TrimStart(".") }
                if ($newFileName.EndsWith(".")) { Write-Host $type $item.FullName ends with a period -ForegroundColor Red }
                while ($newFileName.EndsWith("."))   { $newFileName = $newFileName.TrimEnd(".") }
                if ($newFileName.Contains("..")) { Write-Host $type $item.FullName contains double periods -ForegroundColor red }
                while ($newFileName.Contains(".."))  { $newFileName = $newFileName.Replace("..", ".") }
               
                #Fix file and folder names if found and the Fix switch is specified
                if (($newFileName -ne $item.Name) -and ($Fix))
                {
                    Rename-Item $item.FullName -NewName ($newFileName)
                    Write-Host $type $item.Name has been changed to $newFileName -ForegroundColor Blue
                }
            }
        }
    }

Select allOpen in new window

solved.