If you use any of  the Microsoft System Center products and Visio 2007, then I recommend downloading any of the applicable free add-ins below.

Active Directory Topology Diagrammer
You can read your AD structure through Microsoft ActiveX Data Objects (ADO). The Active Directory Topology Diagrammer tool automates a diagram of the Active Directory Domain topology, your Active Directory Site topology, your OU structure or your current Exchange 200X Server Organization.

With the Active Directory Topology Diagrammer tool, you can also draw partial Information from your Active Directory, like only one Domain or one site. The objects are linked together, and arranged in a reasonable layout that you can later interactively work with the objects in Microsoft Office Visio.

Baseline Security Analyzer for Visio
This add-In for Microsoft Baseline Security Analyzer 2.1 lets you view the results of an MBSA scan in a clear, comprehensive Visio 2007 network diagram.

You must have both Visio 2007 Professional and MBSA 2.1, a free security tool from Microsoft, for this Add-In to work properly. Now you can scan your Hardware for security issues within Visio.

Datacenter Storage Monitoring Add-in (NRTM)
This Visio Add-in uses the new Data Graphics feature of Visio 2007 to display the results of server monitoring. Manage your Server Disk space or Data center servers with this easy to use out of the box solution which helps you generate detailed Server storage diagrams in minutes and keeps it updated to become the dependable dashboard you need to manage disk space on all your Servers.

Exchange Server 2007 Add-in
This Add-In makes it easy for Exchange administrators to visualize, explore, and communicate complex information.   Instead of viewing single user data, Exchange administrators can create data-connected Visio diagrams that display data at a glance and dramatically increase productivity. You can diagram a Microsoft® Exchange Server 2007 site topology, including sites, servers, and connections for an organization.

Folder Access Rights Map
Folder Access Rights Map helps you see a shared folder’s setting conditions at a glance. It outputs the configurations and the Folder Access Rights of the shared folders on your file server to Microsoft Office Visio or Excel.
With Folder Access Rights Map, you can:

  1. Obtain shared folders from the Active Directory, list them and select them individually.
  2. Specify the number of layers in the folder hierarchy for output to Visio or Excel.
  3. Display the setting conditions of shared access or NTFS access.
  4. Visually retrieve and display a folder which has a designated account.

PowerShell for Visio
PowerShell Script Generator Add-In for Microsoft Office Visio provides PowerShell users a visual designer for creating simple PowerShell scripts.

Install this Add-In and discover how easy it is to create simple PowerShell scripts by dragging and dropping Visio shapes.

This Add-In provides a limited set of operations that can be scripted for PowerShell.

If you need to create more advanced scripts with elaborate processing it is recommend you use existing PowerShell tools.

Rack Server Virtualization Add-in
With majority of server hardware being under-utilized, this very valuable tool can draw a clear picture of your hardware utilization. This tool auto-generates the diagram of your rack and provides clear server details from a linked Excel®  template.

This Visio Add-In(s) for System Center Operations Manager and System Center Configuration Manager, developed by TCS, allows IT professionals to visualize data. Allowing the granular filtering of data Administrators need to quickly resolve networking issues.

Data filtering options for:
     Operations Manager:
            Fetch Alerts
            Computer Health State
     Configuration Manager:
            System Information
            User Groups
            Security Patch Information

Software Upgrade Assessment Add-In
Use this valuable Add-in to assess your client and server infrastructure easily. Evaluate what hardware on the client side you can upgrade to the latest versions of Windows 7. Assess your server infrastructure to check and see which versions of Windows server 2008 or SQL server 2008 you can run on your current infrastructure. All of this in an easy to use and understand Visio 2007 diagram which is automatically generated from and Excel template.

SQL Server Add-In
This add-in takes the input of SQL configuration prerequisites from users for SQL Server installations and shows them in a clear, easy to read diagram. The tool also allows you to see whether you can update your server configurations to the latest version of Microsoft SQL Server 2008.