如何查找DisplayName属性中非空白字符及括号前无空格的AD用户？

Hey there! Let's tackle your two AD user filtering needs with straightforward PowerShell commands and clear explanations:

1. Filter Users with Non-Blank DisplayName #

To find AD users where the DisplayName property has actual non-whitespace content (excluding empty values or entries with only spaces), use this command:

Get-ADUser -Filter * -Properties DisplayName | Where-Object { $_.DisplayName -notmatch '^\s*$' }

• The regex ^\s*$ matches strings that are either empty or made up entirely of whitespace characters.
• Using -notmatch reverses this logic, so we only retain users with a DisplayName that contains meaningful text.

2. Filter Users with DisplayName Format Like John Wick(IT Engineer) (No Space Before Parentheses) #

You already have the command to find users with two or more spaces before parentheses (\s{2,}\(). To target the opposite scenario—where there's no space at all before the opening parenthesis—we'll use a negative lookbehind assertion in regex:

Get-ADUser -Filter * -Properties DisplayName | Where-Object { $_.DisplayName -match '(?<!\s)\(' }

• The regex (?<!\s)\( translates to: "match an opening parenthesis ( that is NOT preceded by a whitespace character".
• This will accurately catch entries like John Wick(IT Engineer) where the parenthesis directly follows the name without any space, while excluding users with spaces before the (.

内容的提问来源于stack exchange，提问作者Arbelac