MICROSOFT OFFICE 365 – SSL CERTIFICATE INSTALLATION (IIS)
 

Note: Microsoft Office 365 doesn’t include a GUI for installing a SSL Certificate. Because Office 365 is designed to run on Microsoft IIS, you can use IIS to install your certificate. 

The installation process consists of two steps: installing the certificate on the server and assigning/binding the certificate the default website.
 

OFFICE 365 – HOW TO CREATE CSR FOR IIS 8/8.5 OR IIS 7

If you used IIS to create your CSR, you need to use IIS to install the certificate and then, to assign/bind the certificate to the default website (HTTPS port 443)

 

OFFICE 365 – HOW TO INSTALL YOUR SSL CERTIFICATE USING IIS 8/8.5
 

After TRUSTZONE validates and issues your SSL certificate, you can use IIS to install your SSL certificate to the server where you generated the CSR. Then, you can use IIS to bind the certificate to the default website (HTTPS port 443).

1. Open the ZIP file containing your SSL Certificate and save the SSL Certificate file (your_domain_name.cer) to the desktop of your AD FS server.

2. Open Internet Information Services (IIS) Manager.

From the Start screen, type and click Internet Information Services (IIS) Manager.

3. In Internet Information Services (IIS) Manager, under Connections, select your server’s Hostname.

4. In the center menu, in the IIS section, double-click the Server Certificates icon.

5. In the Actions menu, click Complete Certificate Request to open the Complete Request Certificate wizard.

 

6. In the Complete Certificate Request wizard, on the Specify Certificate Authority Response page, under File name containing the certification authority’s response, click … to browse to the .cer certificate file that TRUSTZONE sent you, select the file, and then, click Open.

7. Next, in the Friendly name box, enter a friendly name for the certificate. The friendly name is not part of the certificate; instead, it is used to identify the certificate.

Note: We recommend that you add TRUSTZONE and the expiration date to the end of your friendly name, for example: yoursite-trustzone-expirationDate. This information helps identify the issuer and expiration date for each certificate. It also helps distinguish multiple certificates with the same domain name.

8. Next, in the Select a certificate store for the new certificate drop-down list, select Personal.

9. To install the SSL certificate to the server, click OK.

10. Once you have successfully installed the SSL certificate to the server, you still need use IIS to assign or bind that certificate to the default website (HTTPS port 443).

 

USING IIS 8/8.5 TO ASSIGN THE CERTIFICATE TO THE DEFAULT WEBSITE
 

1. In Internet Information Services (IIS) Manager, under Connections, expand your server’s name, expand Sites, and then select the Default Web Site site.

2. In the Actions menu, under Edit Site, click Bindings.

3. In the Site Binding window, click Add.

4. In the Add Site Bindings window, enter the following information and then, click OK:

  • Type: In the drop-down list, select https.
  • IP address: In the drop-down list, select All unassigned. If your server has multiple IP addresses, select the one that applies.
  • Port: Enter 443, unless you are using a non-standard port for SSL traffic.
  • SSL certificate: In the drop-down list, select the friendly name of the certificate that you just installed.

5. Your SSL certificate is now installed, and the website configured to accept secure connections.

 

TEST YOUR INSTALLATION 

To verify that the installation is correct, use our TRUSTZONE SSL Labs and enter the DNS name of the site (i.e. www.yourdomain.com, or mail.yourdomain.com) that you are securing to test your SSL certificate.

 

OFFICE 365 – HOW TO INSTALL YOUR SSL CERTIFICATE USING ISS 7
 

After TRUSTZONE validates and issues your SSL certificate, you can use IIS to install your SSL certificate to the server where you generated the CSR. Then, you can use IIS to bind the certificate to the default website (HTTPS port 443).

1. Open the ZIP file containing your SSL certificate and save the SSL certificate file (your_domain_name.cer) to the desktop of your AD FS server.

2. Open Internet Information Services (IIS) Manager.

In the Windows Start menu, click Administrative Tools > Internet Information Services (IIS) Manager.

3. In Internet Information Services (IIS) Manager, under Connections, select your server’s Hostname.

4. In the center menu, in the IIS section, double-click the Server Certificates icon.

5. In the Actions menu, click Complete Certificate Request to open the Complete Request Certificate wizard.

6. In the Complete Certificate Request wizard, on the Specify Certificate Authority Response page, under File name containing the certification authority’s response, click … to browse to the .cer certificate file that TRUSTZONE sent you, select the file, and then, click Open.

7. Next, in the Friendly name box, enter a friendly name for the certificate. The friendly name is not part of the certificate; instead, it is used to identify the certificate.

Note: We recommend that you add TRUSTZONE and the expiration date to the end of your friendly name, for example: yoursite-trustzone-expirationDate. This information helps identify the issuer and expiration date for each certificate. It also helps distinguish multiple certificates with the same domain name.

8. To install the SSL certificate to the server, click OK.

Note: Known Issue in IIS 7: There is a known issue in IIS 7 where the following error message is displayed: 'Cannot find the certificate request associated with this certificate file. A certificate request must be completed on the computer where it was created'. You may also receive a message stating: 'ASN1 bad tag value met'. 

Solution: If this is the server where you generated the CSR, in most cases, the certificate is actually installed. Simply close Internet Information Services (IIS) Manager and reopen it to refresh the list of server certificates. The new certificate should now be in the list, and you can continue with the next step.

If the new certificate is not in the list, you need to one of the following things:

  • Reissue your certificate.
    • Create a new CSR (See Microsoft Office 365: SSL Certificate CSR Creation (IIS))
    • After creating a new CSR, login to the TRUSTZONE portal (your account).
    • Next to your certificate, click Re-Key Your Certificate.

9. Once you have successfully installed the SSL Certificate to the server, you still need use IIS to assign or bind that certificate to the default website (HTTPS port 443).

 

USING IIS 7 TO ASSIGN THE CERTIFICATE TO THE DEFAULT WEBSITE 
 

1. In Internet Information Services (IIS) Manager, under Connections, expand your server’s name, expand Sites, and then select the Default Web Site site.

2. In the Actions menu, under Edit Site, click Bindings.

3. In the Site Binding window, click Add.

4. In the Add Site Bindings window, enter the following information and then, click OK:

  • Type: In the drop-down list, select https.
  • IP address: In the drop-down list, select All unassigned. If your server has multiple IP addresses, select the one that applies.
  • Port: Enter 443, unless you are using a non-standard port for SSL traffic.
  • SSL certificate: In the drop-down list, select the friendly name of the certificate that you just installed.


 

5. Your SSL certificate is now installed, and the website configured to accept secure connections.

 

TEST YOUR INSTALLATION
 

To verify that the installation is correct, use our TRUSTZONE SSL Labs and enter the DNS name of the site (i.e. www.yourdomain.com, or mail.yourdomain.com) that you are securing to test your SSL certificate.

 

Last updated: August 21, 2017