Create your CSR with the New Exchange Certificate Wizard
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Access the Exchange Admin Center by opening a browser and browsing to https://localhost/ecp
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Login using Domain\user name as the format for the user name and enter your password.
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Click the link to Servers in the left column, then Certificates at the top right, then the + symbol.
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The "new exchange certificate" wizard will appear in a pop-up window
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Choose "Create a request for a certificate from a certification authority"
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In the friendly name field, enter a name by which you will remember this certificate in the future.
—This name is not an integral part of your certificate request.
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You can check the box and enter the root domain name if you will be generating the CSR for a wildcard. Otherwise, just go to the next screen.
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Hit Browse to choose which server you want to store the certificate request on.
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If you are doing a wildcard cert, you will skip this step. From the list, select the services which you plan on running securely by using Ctrl+Click to highlight the services.
At the next screen, you will be able to review a list of the names which Exchange 2013 suggests you include in your certificate request.
—Review those names and add any extra names by using the + button.
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Your Organization name should be the full legal name of your company.
—Your Department name is your department within the organization.
—If you do not have a state/province, enter the city information again.
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Enter a network share path to save the CSR to your computer as a .req file, then Finish.
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You should now be able to open the CSR with notepad or wordpad, and you will want to copy the entire body of that file into the online order process.
