Update README.md

README.md

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 # Find-EmailAddress
 Find-EmailAddress is a PowerShell script that retrieves Active Directory objects by searching for a specified email address or alias. The script then outputs the object's username, display name, email address, and the Organizational Unit (OU) location.
 
+## Requirements
+The script requires PowerShell 3.0 or later and the Active Directory module to be installed on your system. To check the PowerShell version on your system, run the following command:
+```powershell
+$PSVersionTable.PSVersion
+```
+If you have an earlier version of PowerShell, consider upgrading to a newer version for better compatibility and security. You can download the latest version of PowerShell from the [official GitHub repository](https://github.com/PowerShell/PowerShell).
+
+To install the Active Directory module, you can follow the instructions in this [Microsoft guide](https://docs.microsoft.com/en-us/powershell/scripting/install/installing-windows-powershell?view=powershell-7.1#installing-the-active-directory-module).
+
 ## Installation
-1. Download the Find-EmailAddress.ps1 script.
+1. Download the **`Find-EmailAddress.ps1`** script.
 2. Save it to a convenient location on your computer or server.
 
 ## Usage