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MIIIpDCCB4ygAwIBAgIQCKADw/Or6WqnCIVhHvaGQjANBgkqhkiG9w0BAQsFADBL I:/C=US/O=DigiCert Inc/CN=DigiCert Cloud Services CA-1ġ s:/C=US/O=DigiCert Inc/CN=DigiCert Cloud Services CA-1 Verify error:num=20:unable to get local issuer certificateĠ s:/C=US/ST=Washington/L=Redmond/O=Microsoft Corporation/CN= – Ensure that the right directory is used to execute this command.ģ) C:OpenSSL-Win32bin> openssl.exe s_client -connect :587 -starttls smtpĭepth=1 C = US, O = DigiCert Inc, CN = DigiCert Cloud Services CA-1 In this example, OpenSSL is installed in C. To get the certificate of Microsoft Office 365.ġ) Download and install OpenSSL on any Windows machine.Ģ) Navigate to the OpenSSL directory and execute this command. In order to use Microsoft Office 365 mail server, there are some extra steps that need to be configured to allow email from FortiAuthenticator.įortiAuthenticator is not pre-loaded with Microsoft and other service providers’ certificates, therefore the first step is to add Certificate Chain in FortiAuthenticator as a trusted CAs manually.įollow the steps mentioned below to download and import the certificate in FortiAuthenticator before starting to configure email settings.

To allow 2FA authentication, configure mail server settings in FortiAuthenticator. This article describes how to configure Microsoft Office 365 as a mail server in FortiAuthenticator. You can find this setting at Org settings > Modern authentication.