Set-SPOSiteGroup.ps1

#Requires -Version 5.0
#Requires -Modules Microsoft.Online.SharePoint.PowerShell

<#
    .SYNOPSIS
        Updates the SharePoint Online owner and permission levels on a group inside a site collection
    
    .DESCRIPTION  

    .NOTES
        This PowerShell script was developed and optimized for ScriptRunner. The use of the scripts requires ScriptRunner. 
        The customer or user is authorized to copy the script from the repository and use them in ScriptRunner. 
        The terms of use for ScriptRunner do not apply to this script. In particular, ScriptRunner Software GmbH assumes no liability for the function, 
        the use and the consequences of the use of this freely available script.
        PowerShell is a product of Microsoft Corporation. ScriptRunner is a product of ScriptRunner Software GmbH.
        © ScriptRunner Software GmbH

    .COMPONENT
        Requires Module Microsoft.Online.SharePoint.PowerShell

    .LINK
        https://github.com/scriptrunner/ActionPacks/tree/master/O365/SharePointOnline/Sites

    .Parameter Group
        [sr-en] Name of the group

    .Parameter Site
        [sr-en] Site collection the group belongs to

    .Parameter Name
        [sr-en] New name of the group

    .Parameter Owner
        [sr-en] Owner (individual or a security group) of the group to be created

    .Parameter PermissionLevelsToAdd
        [sr-en] Permission levels to grant to the group
        
    .Parameter PermissionLevelsToRemove
        [sr-en] Permission levels to remove from the group
#>

param(            
    [Parameter(Mandatory = $true)]
    [string]$Site,
    [Parameter(Mandatory = $true)]
    [string]$Group,
    [string]$Name,
    [string]$Owner,
    [ValidateSet('View Only','Read','Limited Access','Contribute','Approve','Edit','Design','Manage Hierarchy','Full Control')]
# localized :-(   [ValidateSet('Nur anzeigen','Lesen','Beschränkter Zugriff','Mitwirken','Genehmigen','Bearbeiten','Entwerfen','Hierarchie verwalten','Vollzugriff')]
    [string]$PermissionLevelsToAdd,
    [ValidateSet('View Only','Read','Limited Access','Contribute','Approve','Edit','Design','Manage Hierarchy','Full Control')]
# localized :-(   [ValidateSet('Nur anzeigen','Lesen','Beschränkter Zugriff','Mitwirken','Genehmigen','Bearbeiten','Entwerfen','Hierarchie verwalten','Vollzugriff')]
    [string]$PermissionLevelsToRemove
)

Import-Module Microsoft.Online.SharePoint.PowerShell

try{
    [hashtable]$cmdArgs = @{'ErrorAction' = 'Stop'
                            'Site' = $Site
                            'Identity' = $Group
                            }      
    
    if([System.String]::IsNullOrWhiteSpace($Name) -eq $false){
        $cmdArgs.Add('Name',$Name)
    }
    if([System.String]::IsNullOrWhiteSpace($Owner) -eq $false){
        $cmdArgs.Add('Owner',$Owner)
    }
    if([System.String]::IsNullOrWhiteSpace($PermissionLevelsToAdd) -eq $false){
        $cmdArgs.Add('PermissionLevelsToAdd',$PermissionLevelsToAdd)
    }
    if([System.String]::IsNullOrWhiteSpace($PermissionLevelsToRemove) -eq $false){
        $cmdArgs.Add('PermissionLevelsToRemove',$PermissionLevelsToRemove)
    }

    $result = Set-SPOSiteGroup @cmdArgs | Select-Object *
      
    if($SRXEnv) {
        $SRXEnv.ResultMessage = $result
    }
    else {
        Write-Output $result 
    }    
}
catch{
    throw
}
finally{
}