Use this method if you receive an error message 1 or 2 errors . Examine the certificate. Then , contact your system administrator to resolve the problem.To examine the certificate, follow these steps:
1. In Microsoft Internet Explorer , connect to the RPC server or to a secure server . For example, type https://www.server_name.com/rpc in the address bar of your Web browser , and then press ENTER.Note The server_name placeholder refers to the name of the RPC server or the name of the secure server .
2. Double-click the lock icon located in the lower right corner of the browser.
3. Click the Details tab.
4. Write down the information in the following fields :or valid for The Valid to field indicates the date until which the certificate is valid.or Subject The data in the Subject field must match the name of the site.
Use this method if you receive the error message 3 To install the trusted root certificate , follow these steps . :
1 . Click Install Certificate when prompted with the Certificate dialog box .
2 . Click Next .
3 . Select Place all certificates in the following store check box .
4 . Click Browse .
5 . Click the Trusted Root Certification Authorities , and then click OK.
6 . Click Next .
7 . Click Finish .
8 . Click OK .
Method 3: Disable the third-party add-ons
Use this method if you receive an error message .
1 . The ' Start Outlook in safe mode to isolate the problem. To do this , click Start , click Run, type outlook.exe / safe , and then click OK.If you start Outlook in safe mode successfully , the problem that you are experiencing may be caused by a third-party add-ons .
2 . Check third-party COM add-ins and disable them. To do this , follow these steps:one . From the File menu , click Options, and then click Add-Ins.
3 . In the Manage box, click COM Add-Ins , and then click Go .
4 . Click to clear the check box next to the third-party add-ons that you want to disable .
5 . Restart Outlook .
Finally after Windows 7 is updated, no longer appear error code 8.