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Information about the characters that you cannot use in site names, folder names, and file names in SharePoint

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INTRODUCTION
This article lists the characters that you cannot use in the following names in Microsoft SharePoint:
  • Site names
  • Folder names
  • Server names
  • File names
More information
For more information about the underscore character (_) in server names, click the following article number to view the article in the Microsoft Knowledge Base:
325192 Issues after you install updates to Internet Explorer or Windows

Site names, subsite names, or site group names

  • You cannot use the following characters anywhere in a site name, in a subsite name, or in a site or Active Directory group name:
    • Tilde (~)
    • Number sign (#)
    • Percent (%)
    • Ampersand (&)
    • Asterisk (*)
    • Braces ({ })
    • Backslash (\)
    • Colon (:)
    • Angle brackets (< >)
    • Question mark (?)
    • Slash (/)
    • Plus sign (+)
    • Pipe (|)
    • Quotation mark (")
  • You cannot start a site name, a subsite name, or a site group name with an underscore (_) character or with the period (.) character.
  • When you create a site name, a subsite name, or a site group name, you cannot use strings that were already used to name managed paths.
  • You cannot use the period character consecutively in the middle of a site name, a subsite name, or a site group name.
  • You cannot use the period character at the end of a site name, a subsite name, or a site group name.

Folder names

  • You cannot use the following characters anywhere in a folder name or a server name:
    • Tilde
    • Number sign
    • Percent
    • Ampersand
    • Asterisk
    • Braces
    • Backslash
    • Colon
    • Angle brackets
    • Question mark
    • Slash
    • Pipe
    • Quotation mark
  • You cannot use the period character consecutively in the middle of a folder name.
  • You cannot use the period character at the end of a folder name.
  • You cannot start a folder name with a period character.
  • If you use an underscore character (_) at the beginning of a folder name, the folder will be a hidden folder.
  • Additionally, a folder that contains the string "_vti_" is reserved by SharePoint, and isn’t supported.

File names

  • You cannot use the following characters anywhere in a file name:
    • Tilde
    • Number sign
    • Percent
    • Ampersand
    • Asterisk
    • Braces
    • Backslash
    • Colon
    • Angle brackets
    • Question mark
    • Slash
    • Pipe
    • Quotation mark
  • You cannot use the period character consecutively in the middle of a file name.
  • You cannot use the period character at the end of a file name.
  • You cannot start a file name by using the period character.
  • If you use an underscore character (_) at the beginning of a file name, the file will be a hidden file.
  • ile names and folder names may not end with any of the following strings: 
    • .files
    • _files
    • -Dateien
    • _fichiers
    • _bestanden
    • _file
    • _archivos
    • -filer
    • _tiedostot
    • _pliki
    • _soubory
    • _elemei
    • _ficheiros
    • _arquivos
    • _dosyalar
    • _datoteke
    • _fitxers
    • _failid
    • _fails
    • _bylos
    • _fajlovi
    • _fitxategiak
  • In addition, file names and folder names cannot start with the “_vti_” string, such as the followings:
    • _vti_cnf
    • _vti_pvt
    • _vti_bin
    • _vti_txt
For more information about the restrictions and limitations when you sync SharePoint libraries to your computer by using OneDrive for Business for SharePoint Server 2013 and SharePoint Online, go to the following Microsoft Knowledge Base article:
2933738 Restrictions and limitations when you sync SharePoint libraries to your computer through OneDrive for Business
SPS
Properties

Article ID: 905231 - Last Review: 04/13/2015 08:08:00 - Revision: 13.0

Microsoft Windows SharePoint Services 3.0, Microsoft Windows SharePoint Services 2.0, Microsoft Office SharePoint Server 2007, Microsoft Office SharePoint Portal Server 2003, Microsoft SharePoint Foundation 2010, Microsoft SharePoint Server 2010, Microsoft SharePoint Server 2013

  • kbtshoot kbinfo KB905231
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