How to Deploy SSL Certificate on a Computers Using GPO?

Let’s look on how to centrally deploy an SSL certificates on a area computer systems and add it to the Trusted Root Certification Authorities utilizing Group Policy. After the certificates is deployed, all consumer gadgets will belief the providers which can be signed by this certificates. In our case, we are going to deploy the self-signed SSL Exchange certificates (the Active Directory Certificate Services position within the area shouldn’t be put in) to person’s computer systems in AD.

If you employ a in your Exchange server, the message will seem on the consumer computer systems through the first begin of Outlook that this certificates shouldn’t be trusted and it’s not secure to use it.

To take away this warning, you have got to add the Exchange certificates to the record of trusted certificates on the person laptop. This may be finished manually (or by integrating the certificates to the company OS picture), however it’s simpler and extra successfully to mechanically set up the certificates utilizing GPO. When utilizing such a certificates distribution scheme, all obligatory certificates might be mechanically put in on all previous and new area computer systems.

First of all, you have got to export the self-signed certificates out of your Exchange server. To do it, logon to your server, run mmc.exe and add Certificates (for a native laptop) snap-in.

Go to the part Certificates (Local Computer)  -> Trusted Root Certification Authorities -> Certificates.

Find your Exchange certificates in the correct pane, proper click on on it  and choose All Tasks ->Export.

In the Export Wizard, choose DER encoded binary X.509 (.CER) format and specify the trail to the certificates file.

You may export the SSL certificates immediately from the browser. In Internet Explorer, open the HTTPS handle of your internet server with an untrusted certificates (within the case of Exchange, that is often an handle of the shape https://exchange_cas/owa). Click the Certificate Error icon within the handle bar, click on View Certificate, and go to the Details tab. Click the Copy to File button to open the Certificate Export to CER file wizard.

You may get the SSL certificates of the HTTPS web site and put it aside in a CER file from PowerShell utilizing the methodology:

$webRequest = [Net.WebRequest]::Create("https://exchange_cas/owa")
attempt catch
$getcert = $webRequest.ServicePoint.Certificate
$bytes = $getcert.Export([Security.Cryptography.X509Certificates.X509ContentType]::Cert)
set-content -value $bytes -encoding byte -path "c:psyour_exchange_cert.cer"

So you have got exported the Exchange certificates in a CER file. You want to place the certificates file to the shared community folder and all customers should have a learn entry to it. (If obligatory, the entry may be restricted with NTFS permissions or the folder may be hidden utilizing ). For instance, let the trail to the certificates file be as follows: lon-fs01GroupPolicy$Certificates.

Let’s go to creation of a new certificates deployment coverage. To do it, begin the Group Policy Management console (gpmc.msc). Create a new coverage by deciding on the OU (in our instance, it’s the OU containing computer systems since we don’t need the certificates to be put in on servers and technological techniques), and within the context menu choose Create a GPO on this area and Link it right here…

Specify the coverage identify (Install-Exchange-Certificate) and change to the coverage edit mode.

In the GPO Editor, go to the part Computer Configuration –> Policies –> Windows Settings –> Security Settings –> Public Key Policies –> Trusted Root Certification Authorities.

Right-click in the correct a part of the GPO editor window and choose Import.

Specify the trail to the imported certificates file, which you have got positioned within the shared folder.

In the corresponding step of the wizard (Place all certificates within the following retailer), do specify that it has to be positioned within the Trusted Root Certification Authorities.

The certificates distribution coverage created. You can extra precisely goal this coverage on the purchasers utilizing Security Filtering or .

Let’s check the coverage by operating gpupdate /power on the consumer. Verify that your certificates has appeared within the record of trusted certificates. It may be finished both within the Manage Certificate snap-in (Trusted Root Certification Authorities->Certificates) or within the Internet Explorer settings (Internet Options -> Content ->Certificates-> Trusted Root Certification Authorities).

Now throughout Outlook configuration the warning of the untrusted certificates gained’t seem.

You can examine that within the browser whenever you open your HTTPS web site (in our instance, that is Exchange OWA), a warning about an untrusted SSL certificates will not seem. Now, whenever you configure Outlook to join your Exchnage server ( is feasible solely by means of the registry), the warning of the untrusted certificates gained’t seem.

If you need the apply the certificates deploy coverage solely to computer systems (or customers) in a particular AD safety group, choose your Install-Exchange-Cert coverage within the Group Policy Management console. On the Scope tab within the Security Filtering part, delete the Authenticated Users group and add your safety group identify (for instance, AllowAutoDeployExchCert). If you hyperlink this coverage to the area root, your certificates might be mechanically put in on computer systems which can be added to the safety group.

The identical GPO permits you to set up SSL certificates on a number of computer systems without delay. For extra details about the certificates which can be deployed by your coverage, examine the coverage Settings within the GPMC console. As you’ll be able to see, the Issued To, Issued By, Expiration Date, and Intended Purposes certificates properties are displayed.

If computer systems don’t have direct Internet entry, this manner you’ll be able to replace trusted root certificates on all gadgets within the area. But there’s a easier and extra right within the remoted domains.

Thus, you have got sure a coverage of automated certificates distribution on all area area (on a particular organizational unit or area safety group). The certificates might be mechanically put in on all new computer systems, with out requiring any handbook actions from technical help workforce. For safety causes, it’s advisable to periodically .


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