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October 2008

Safeguard Sensitive Content with Information Rights Management

Use RMS and IRM access and usage restrictions to protect Office-created content
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In subsequent steps, you’ll enter the internal web address by which the RMS server will be known and specify whether to use Secure Sockets Layer (SSL) to protect RMS. To specify the internal web address, you should use a Fully Qualified Domain Name (FQDN); otherwise, you won’t be able to add servers later to create a cluster. The best practice is to use a DNS virtual A record that has the same IP address as the RMS server and website. For the SSL option, I recommend that you choose to use SSL—if you plan to support federation later, you must select SSL now. If you accept the default to use SSL and you don’t have IIS installed or websites configured for SSL, the wizard prompts you to either choose an existing SSL certificate, create a self-signed certificate, or install one manually later. If you opt to install an SSL certificate later, you won’t be able to easily configure RMS. You can always use the IIS administration tool to request a different certificate later.

Next, you’ll specify a name for your RMS installation and specify whether you want to register RMS in a service- ConnectionPoint (SCP) object in AD. If you don’t, you’ll have to configure registry overrides on users’ computers before they can use IRM. I cover SCP registration and registry overrides later.

If you haven’t installed IIS or haven’t configured it to support RMS, the wizard will show you what will be installed or configured. You shouldn’t have to make any changes. If you’re happy with your selections when the wizard lists them for your review, simply click Install to proceed. You’ll need to restart your server to make RMS available for use. Afterward, you can view your RMS configuration details in the Server Manager administration console, as Figure 1 shows. If you use SSL and the RMS server’s internal address isn’t the same as the host name, you’ll get a certificate error, which you can safely ignore.

Installing and Using IRM
The RMS client is built into Vista and doesn’t need to be installed—as long as you publish the SCP in AD when you set up RMS, no further configuration is required. For XP and Win2K systems, you need to download the RMS client from www.microsoft .com/rms. To distribute the package, you can use Microsoft Systems Management Server, System Center Configuration Manager (a third-party software distribution tool), or Group Policy. If you use Windows Server Update Services or Microsoft System Center Essentials, you can distribute the RMS client as an update. If you didn’t publish the SCP in AD, you need to set each client machine’s HKEY_LOCAL_MACHINE\SOFTWARE Microsoft\MSDRM\ServiceLocation\Enter prisePublishing registry subkey to the value http://internal address/_wmcs/Licensing, where internal address is the URL of the RMS server specified during installation. If you’re using SSL, substitute https for http.

Users typically won’t need to take any special steps to begin using IRM. Office applications will automatically detect the RMS client, and the first time a user protects a document or email message or attempts to consume a protected document or message, the IRM features will be available in the GUI. As long as the client and user are validated, the user is issued every license and certificate necessary to protect content or access protected content. Figure 2 shows a protected email message and Word document and their respective IRM buttons.

When a user’s client initially connects to the RMS server, the user is prompted to enter credentials if the server’s internal address isn’t in IE’s Local intranet zone or in another zone that’s configured to automatically send credentials when they’re required. In that case, either the user can manually add the internal address to the Local intranet zone or you can configure all your users’ IE settings through Group Policy.

To protect and send an Outlook email message, you can simply click Permission on the message’s toolbar and click Send. Recipients are automatically granted the rights to read and reply to the message, but not to forward or print it. You can also create and use templates to grant more rights or further restrict rights. To protect content created by other Office applications, you click the Protect Document button on the Review tab, then select Restricted Access to open the Permission dialog box shown in Figure 3. Select the Restrict permission to this document check box to make the dialog box’s options available, and enter the names of users who will have Read and Change rights. If you have Microsoft Exchange Server 2007 or 2003 in your environment, clicking the Read or Change button will make the Select Names dialog box appear. In an Exchange 2007 or 2003 shop, you can grant rights to user groups and mail-enabled universal security groups and enter user and group names directly into the fields alongside the Read and Change buttons.

If you aren’t using Exchange 2007 or Exchange 2003, you can specify users and groups by email address. To give users outside your organization rights to content, you’ll have to use email addresses and configure RMS for external collaboration.

To change or add permissions, click More Options in the Permission window to see the dialog box in Figure 4. The expiration option lets you specify a date after which users can’t open the protected document regardless of their permissions. The author can still open the protected document and can remove permissions or extend the expiration date.

With that basic understanding of how to use IRM, let’s look at how to create and use templates to avoid mistakes when configuring content protections.

Creating and Using Templates
If your users repeatedly grant certain recipients the same rights to content, you can use templates to simplify the process. You create and store the templates on the RMS server, then distribute them to users, either individually or in a file share. (The latter option is practical for mobile users only when combined with offline folders.)

Templates are created as XML files. To create a template, open the RMS role in Server Manager, expand a server node, and select the Rights Policy Templates node to open the Distributed Rights Policy Templates window, shown in Figure 5. Set the template-storage location by clicking Change distributed rights policy templates file location at the bottom of the center pane. Select Enable export in the Rights Policy Templates dialog box and enter the UNC path of a folder to which the RMS service account has change permissions, as Figure 6 shows. Click OK, then make sure that the service account has both NTFS and share-level permissions. Next, click the Create distributed rights policy template link in the right-hand pane.

Actually creating the template is a fivestep process.

1. For each language you use, specify the template name and a description.

2. Specify users and groups and the rights you want to grant to each.

3. If you want content to expire, specify an expiration interval. You can also force users to obtain a new use license at a specified interval. Designating end-user license expiration dates is useful in conjunction with exclusion, an advanced feature used to deny access to protected content.

4. Configure whether users can view protected content using the RMA and whether they must obtain a new use license every time they open protected content.

5. Configure revocation lists. An advanced feature that isn’t commonly used, revocation lets you revoke rights-protection components. For example, you can use revocation to prevent users who were erroneously granted access rights from opening a document that’s already been distributed.

For Office to be able to access templates, you need to add the HKEY_ CURRENT_USER Software\Microsoft Office\version\Com mon\DRM\Admin TemplatePath registry setting to each user’s computer, where version is 12.0 for Office 2007 and 11.0 for Office 2003. To modify the registry for multiple users, you can download and use the Office 2007 administrative templates and Group Policy. After you configure the template path, Office applications import the templates and display them under the Protect Document menu option, as in Figure 7.

Real Data Protection
IRM and RMS take Office applications in a powerful new direction to help you prevent accidental data loss and intentional but inappropriate disclosure of sensitive organizational information. Once you’ve set up RMS, IRM lets users easily protect sensitive Word documents, Excel spreadsheets, PowerPoint presentations, Outlook emails, and InfoPath forms. If you also consider how user-friendly IRM is, it can be a good security solution for organizations of all sizes.

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