Certificate error

Question

i am getting certificate error when opening outlook application. i have attached screen shot. please help me to fix this issue.

Answer 1

Dear Works (works),

Good day! Thank you for posting to Microsoft Community. We are happy to help you.

I understand that you have a concern regarding Certificate error when opening outlook application.

Please try to Renew Exchange Server Certificate Using PowerShell;

Display the full list of Exchange certificates and copy the ThumbPrint of the certificate you want to renew.

Get-ExchangeCertificate | C:\ExchangeCertThumbPrint.txt

For example, your certificate ThumbPrint is 1234512345123451234512345123451234512345.

Use the following PowerShell command to create renewal request for your certificate and save it on a shared folder:

Get-ExchangeCertificate -Thumbprint 1234512345123451234512345123451234512345| New-ExchangeCertificate -GenerateRequest -RequestFile "\\your_exch_srv_name\share\renewcert.req" -PrivateKeyExportable:$true

After receiving a new certificate from CA, complete the certificate request:

Import-ExchangeCertificate -FileName “\\your_exch_srv_name\share\company_new_sslcert.cer" -PrivateKeyExportable:$true

Now enable this certificate for the required Exchange services:

Enable-ExchangeCertificate –Thumbprint 9519495194951949519495194951949519495194 –Services "IIS, SMTP, POP, IMAP"

It remains only to restart IIS on your Exchange server:

Restart-Service W3SVC

Kindly find this link for your reference: Renew an Exchange Server certificate.

We look forward to your response. Thanks for your cooperation.

Sincerely,

Anesu | Microsoft Community Moderator

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