docs: Add backup-groupmembers.ps1

powershell/POWERSHELL.md

@@ -1,22 +1,46 @@
 # Powershell
 
-## `add-usertogroupwithlicense.ps1`
+## Active Directory
+
+### `add-usertogroupwithlicense.ps1`
 
 This script is used to add a user to a license group and an application group in the local active directory.
 
-### Usage
+#### Usage
 
 ```powershell
 .\add-usertogroupwithlicense.ps1
 ```
 
-### Variables
+#### Variables
 
 - `dn`: The domain name of the local active directory.
 - `license_group`: The name of the license group.
 - `application_group`: The name of the application group.
 - `user`: The name of the user to add to the groups.
 
-## `add-usertogroupwithlicense.ps1`
+### `backup-groupmembers.ps1`
 
-This script is used to add a user to a license group and an application group in the local active directory.
+This script is used to backup the members of a group in the local active directory. The script will create a CSV file with the members of the group.
+
+#### Usage
+
+##### Prepare the script
+
+```powershell
+...
+
+$server = "$($global_catalog.Name):3268"
+
+$groups = @("Domain Admins", "Domain Users")
+
+$csv_file = "backup_$(Get-Date -Format 'yyyy-MM-dd_HH-mm-ss').csv"
+
+...
+```
+
+##### Run the script
+
+```powershell
+.\backup-groupmembers.ps1
+```