Enabling the script editor for a tenant on SharePoint involves several steps and permissions settings, especially if you are using SharePoint Online. Here is a comprehensive guide to help you through the process: Step 1: Enable Custom Script in the SharePoint Admin Center Access the SharePoint Admin Center: Go to the Microsoft 365 admin center at https://admin.microsoft.com. In the left-hand navigation pane, select Show all to see all admin centers, and then select SharePoint. Enable Custom Script: In the SharePoint admin center, select Settings. Scroll down to the Custom Script section. Choose Allow users to run custom script on personal sites and Allow users to run custom script on self-service created sites. Click OK to save your changes. Note: Changes to custom script settings might take up to 24 hours to take effect. Step 2: Allow Custom Script for Existing Sites For existing SharePoint sites, you need to allow custom scripts via PowerShell. Open SharePoint Online Management Shell: If you don't have it installed, download and install it from Microsoft's official page. Connect to your SharePoint Online tenant: powershell Copy code Connect-SPOService -Url https://-admin.sharepoint.com Run the PowerShell command to allow custom script: powershell Copy code Set-SPOSite -Identity https://.sharepoint.com/sites/ -DenyAddAndCustomizePages 0 Step 3: Verify and Use the Script Editor Web Part Go to your SharePoint site: Navigate to the site where you want to add the Script Editor web part. Edit the Page: Click on the Gear icon (Settings) in the upper right corner and select Site contents. Select the page where you want to add the Script Editor web part and click on Edit. Add the Script Editor Web Part: In the Edit mode, click on the + sign to add a web part. Search for Script Editor and add it to your page. Click on the EDIT SNIPPET link to add your custom script. Important Considerations Security Risks: Allowing custom scripts can expose your SharePoint environment to potential security risks. Ensure that only trusted users have access to add and run custom scripts. Alternatives: For more secure and modern customization, consider using SharePoint Framework (SPFx) web parts instead of the Script Editor web part. By following these steps, you can enable and use the Script Editor web part in your SharePoint Online tenant.