CODEWITHSUNDEEP
exchange-servermicrosoft-dynamicsdynamics-365
Chicken Sandwich No Pickles
Chicken Sandwich No Pickles

Reputation: 3362

Certificate used for S2S authentication of Dynamics 365 for Customer Engagement Onpremise with Exchange Online has expired

I have the following error:

Certificate used for S2S authentication of Dynamics 365 for Customer Engagement Onpremise with Exchange Online has expired

Has anyone had this error before? Can you give me more clarification?

Upvotes: 1

Views: 5319

Answers (1)

James Wood
James Wood

Reputation: 17562

Certificates are only valid for a period of time, I'm going to guess your certificate has expired due to age.

"Exchange Online Security Certificate Expiration" error message displayed in Dynamics 365 On-premises or Dynamics 365 for Outlook.

Applies to Microsoft Dynamics 365 Server configured with a connection to Exchange Online or SharePoint Online. The message states "Please update your certificate or Exchange Online integration will stop functioning in [number] days."

To resolve this issue, update the x509 digital certificate issued by a trusted certificate authority used to authenticate between Dynamics 365 (on-premises) and Exchange Online or SharePoint Online.

Looks like you will need to get a valid certificate and repeat the setup process described here Connect Dynamics 365 for Customer Engagement (on-premises) to Exchange Online

Verify prerequisites

...

  • An x509 digital certificate issued by a trusted certificate authority that will be used to authenticate between Dynamics 365 (on-premises) and Exchange Online. If you are evaluating server-based authentication, you can use a self-signed certificate.

In particular step "5. Set the certificate" here Configure server-based authentication

$STSCertificate = New-Object System.Security.Cryptography.X509Certificates.X509Certificate2 -ArgumentList c:\Personalcertfile.pfx, personal_certfile_password
$PFXCertificateBin = $STSCertificate.GetRawCertData()
$Certificate = New-Object System.Security.Cryptography.X509Certificates.X509Certificate2
$Certificate.Import(“c:\Personalcertfile.cer”)
$CERCertificateBin = $Certificate.GetRawCertData()
$CredentialValue = [System.Convert]::ToBase64String($CERCertificateBin)

Upvotes: 1

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