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Open Server Manager on your Windows Server host. By default, Server Manager starts when a member of the Administrators group logs on to a computer that is running Windows Server 2012 R2 or Windows Server 2012. If the Server Manager is not already open, click Start > Server Manager.
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Click Server Manager > Dashboard > Add roles and features. This starts the Add Roles and Features wizard.
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In the Add Roles and Features wizard, do the following:
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On the Before you begin page, click Next.
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On the Select installation type page, accept the default setting of Role-based or feature-based installation. Click Next.
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On the Select destination server page, choose Select a server from the server pool. Your host server should be discovered automatically. Click Next.
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On the Select server roles page, click Next.
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On the Select features page, select Multipath I/O, and click Next.
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On the Confirm installation selections page, confirm the selection and then select Restart the destination server automatically if required, as shown below. Click Install.
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You will be notified when the installation is complete. Click Close to close the wizard.
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