Why does my old cert show for OWA even though I replaced it?

This typically happens when a certificate is installed via the Exchange Management Shell. (EMS) When installing a cert via the EMS, you don’t have the ability to specify the website the certificate is being used on, so you must tell IIS to use the right certificate via the IIS Manager.

IIS 6

1. Right-Clickon the website that contains the OWA folder.
2. Click on Properties.
3. Click on the Directory Security
4. Click Server Certificateunder the Secure communications section
5. Enter Web Server Certificate Wizard
6. Click Next.
7. You are now presented with a few options. Click Replace
8. Select your new certificate from the list and click Next.
9. Verify the Details and click Next.
10. Click Finishto exit the wizard.

IIS 7

1. Using the IIS manager, navigate to the root of the Website that houses the OWA folder. The center of the window should say “Default Website Home” or whatever the name of the website is.
2. Select Bindingsfrom under the Edit Site sub menu.

Web Site Bindings

1. Click httpsso that it is highlighted and then click on the Edit button on the right
2. In the SSL Certificate section, select the new certificate from the drop-down menu
3. Click OKto complete the Installation.

Verification

Double check your OWA site to see if the new certificate is in place!