To Install an Intermediate Certificate in Microsoft Exchange Server 2016- Click Start, and then click Run....
- Type mmc, and then click OK. The Microsoft Management Console (Console1) window opens.
- In the Console1 window, click File, and then select Add/Remove Snap-in.
- In the Add or Remove Snap-ins window, select Certificates, and then click Add.
- In the Computer Account window, select Computer Account, and then click Next.
- In the Select Computer window, select Local Computer, and then click Finish.
- In the Add or Remove Snap-ins window, click OK.
- In the Console1 window, click + to expand the Certificates (Local Computer) folder on the left.
- Right-click Intermediate Certification Authorities, mouse over All Tasks, and then click Import.
- In the Certificate Import Wizard window, click Next.
- Click Browse to find the intermediate certificate file.
- In the Open window, change the file extension filter to PKCS #7 Certificates (*.spc;*.p7b), select the *_iis_intermediates.p7b file, and then click Open.
- In the Certificate Import Wizard window, click Next.
- Select Place all certificates in the following store, and then click Browse.
- In the Select Certificate Store window, select Intermediate Certification Authorities, and then click OK.
- In the Certificate Import Wizard window, click Next.
- Click Finish.
- Click OK.
- Close the Console1 window, and then click No to remove the console settings.
To Install an SSL Certificate in Microsoft Exchange Server 2016
- Log in to the Exchange Admin Center.
- From the left menu, select Servers, and then click Certificates.
- Select your certificate (it has a “Pending request” status), and then click Complete.
- For File to import from, enter the certificate file path we provided (such as \\server\folder\coolexample.crt), and then click OK. Exchange installs your certificate.
- In the Certificates section, select your certificate again (the status changed to “Valid”), and then click Edit (pencil icon).
- Click Services, select the services to which the certificate applies (SMTP, UM, UM call router, IMAP, POP, and/or IIS), and then click OK. Your certificate is now ready to use with Exchange 2016.