There is a problem with the proxy server 's security certificate. The Outlook is unable to connect to the proxy server... (the Error Code20)
Company mailbox every time open the prompt dialog box displays the above content, asking our great god help, the trouble to write about the specific operation, online etc.! Thank you for your attention!

CodePudding user response:

Refer to the following address Solution to see if can solve:
https://support.microsoft.com/en-us/kb/923575
http://msexchangeteam.in/there-is-a-problem-with-the-proxy-servers-security-certificate/

CodePudding user response:

The two sites before I have checked, but has a different problem:
1, https://support.microsoft.com/en-us/kb/923575
The scheme mentioned in https://www.server_name.com/rpc web site won't open

2, http://msexchangeteam.in/there-is-a-problem-with-the-proxy-servers-security-certificate/
The solution of step 7: Browse and Select the Cert, where can I find Cert this file?

To solve, thank you

CodePudding user response:

The

refer to the original poster zhanghaoxuan21 response:

There is a problem with the proxy server 's security certificate. The Outlook is unable to connect to the proxy server... (the Error Code20)
Company mailbox every time open the prompt dialog box displays the above content, asking our great god help, the trouble to write about the specific operation, online etc.! Thank you for your attention!

Certificate issue have detailed information?

Three kinds of commonly, certificate chain distrust
FQDN in
Time window is wrong,

screenshots

CodePudding user response:

After every time just open the popup Windows, click ok, there is no any tips, also does not affect the normal use, but pop up every time I feel I need to put it out,,