hello

I have correctly create a new certificate exchange 2010 with this enregistrement : OWA internal , autodiscover

First all go fine but after few month when i connect outlook 2010 i receve error certificate :

-The security certificate was issued by a company you have not chosen to trust. Check the certificate to determine whether to trust the authority of cerification

-the name on the security certificate is invalid or does not match the name of the site

bat when i open the certificate it's an intrue certificate thas i not create whith unknown sender.

See photo 

Please help me

very difficult to understand your English but either your certificate is expired or if used a internal cert then you need to buy a 3rd party cert.

Hi,

Please run the following command to check the certificate configuration in your Exchange environment:

Get-ExchangeCertificate | FL CertificateDomains,IsSelfSigned,Services,Status,Thumbprint

Please notice the Satus and Service value for the command results. If the Status is expired, please renew the related certificate. If the Status is valid, but the certificate error persists in Outlook client, please check whether there is any service namespace which is used for Exchange service URLs not included in the certificate with IIS service.

We can change the internal URLs for these services to solve the issue. For more information about mismatch issue, please refer to:

https://support.microsoft.com/kb/940726?wa=wsignin1.0

Regards,