*Bulletin ID* A2E_167
*Last Review* 06/06/2007
*Revision* 1.0
*Previous IDs* None
*Obsoletes* None

ERROR: Error 80090325: The Certificate Chain Was Issued by an Untrusted Authority


This error is encountered in Exchange System Manager when trying to administer public folders. It is caused by Internet Explorer not trusting Internet Information Server’s SSL certificate. You need to import the certificate into Internet Explorer’s Trusted Root Certificate Authorities.


An error message is encountered when trying to open Public Folders in Exchange System Manager. The error reads: “The certificate chain was issued by an untrusted authority. ID No: 80090325 Exchange System Manager”.


Import the certificate to the IE Trusted Root Certificate Authorities.

  1. In Internet Explorer, press Alt if necessary to show the menus, then select Tools > Internet Options
  2. Select the Content tab and click Certificates
  3. Click Import…
  4. Click Next >
  5. Click Browse…
  6. Select the certificate file and click Open
    • If you are using Small Business Server 2003, the certificate is typically located in the ClientApps\SBScert folder
  7. Click Browse…
  8. Select the Trusted Root Certification Authorities Store
  9. Click OK
  10. Click Finish
  11. Close the remaining dialogs and reopen Exchange System Manager

Applies To

  • Add2Exchange Standard
  • Add2Exchange Enterprise

Keywords: Error, SSL, Root Certificates, IIS, Exchange System Manager.