Proxy Server Error Code 20
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Outlook Is Unable To Connect To The Proxy Server Error Code 18
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Outlook Is Unable To Connect To The Proxy Server Error Code 2
Exchange > Exchange 2003 and Exchange 2007 - General Discussion Question 0 there is a problem with the proxy server's security certificate error code 80000000 Sign in to vote Hello something strange today in my network.. my users are getting this error when outlook is unable to connect to the proxy server error code 10 exchange 2010 open outllook: impossible connect to proxy server mail.myserver.com (error code 20) do I need to regenerate my certificate on exchange 2003? Ho ca i do it? thanks Monday, March https://support.microsoft.com/en-us/kb/923575 25, 2013 9:14 AM Reply | Quote Answers 1 Sign in to vote Hi , Please perform connectivity test https://www.testexchangeconnectivity.com/ The please go through the below KB article for certificate issues http://support.microsoft.com/kb/923575 For creating a self signed certificate using SelfSSL utility from Microsoft please go through below article http://www.howtogeek.com/107415/it-how-to-create-a-self-signed-security-ssl-certificate-and-deploy-it-to-client-machines/ To download SelfSSL utility download iis6 resource kit from below Microsoft https://social.technet.microsoft.com/Forums/exchange/en-US/00a720e8-2edc-4363-ad3e-72bc3c8e3b06/certificate-issue-outlook-error-code-20?forum=exchangesvrgenerallegacy link http://www.microsoft.com/en-in/download/details.aspx?id=17275Regards, Prakash Nimmala Skype : Prakash.Nimmala Email ID : prakash.nimmala@hotmail.com Whenever you see a helpful reply, click on Vote As Helpful & click on Mark As Answer if a post answers your question. Proposed as answer by wendy_liuMicrosoft contingent staff, Moderator Wednesday, April 03, 2013 1:57 AM Marked as answer by wendy_liuMicrosoft contingent staff, Moderator Wednesday, April 03, 2013 5:02 AM Tuesday, March 26, 2013 5:47 PM Reply | Quote 0 Sign in to vote Hi , Does the certificate includes SAN(Subject Alternative Name) for autodiscover and exchange external url ? Please also check if the root certificate is imported to client if you use a private CA issues the certificate. Outlook gives an error for Proxy Server Certificate: http://social.technet.microsoft.com/Forums/en-US/exchangesvrclients/thread/980846f8-e616-4150-9f6a-eaa85f06a76d Wendy Liu TechNet Community Support
Proposed as answer by wendy_liuMicrosoft contingent staff, Moderator Wednesday, April 03, 2013 1:56 AM Marked as answer by wendy_liuMicrosoft contingent staff, Moderator Wednesday, April 03, 2013 5:02 AM Tuesday, March 26, 2013 9:28 AM Reply | Quote Moderator 0 Sign in to vote There has been similar questions before this: Oa Question Ask for Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Ask a Question Ask for Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Expand Search Submit Close Search Login Join Today Products https://www.experts-exchange.com/questions/25482089/Outlook-unable-to-connect-to-proxy-server-error-code-20.html BackProducts Gigs Live Courses Vendor Services Groups Careers Store Headlines Website Testing Experts Exchange > Questions > Outlook unable to connect to proxy server (error code 20) Want to Advertise Here? Solved Outlook unable to connect to proxy server (error code http://markgossa.blogspot.com/2015/10/outlook-2013-there-is-problem-with-the-proxy-servers-security-certificate.html 20) Posted on 2010-03-23 MS Server OS Outlook Exchange 1 Verified Solution 8 Comments 12,065 Views Last Modified: 2013-12-05 This error has been poping up on all my computers that are using a ssl certificate created for our business for user proxy server to connect to our exchange server via https:// connection. Cannot find anything online to help me with this. Any help would be greatly appreciated. 0 Question by:xXWickedXx Facebook Twitter LinkedIn Google Best Solution byxXWickedXx I figured it out. It was an invalid SSL cert. Anyways thnx for all the help and suggestions. Great website.... Go to Solution 7 Comments LVL 13 Overall: Level 13 MS Server OS 3 Exchange 3 Outlook 1 Message Expert Comment by:jaynir2010-03-24 If your exchange server is the proxy server running on service pack 1, you may need to install service pack 2. 0 Message Author Comment by:xXWickedXx2010-03-31 Ok i tried to update service pack and still produces an error 20 just after you login into outlook. Did updates on server and on laptop with no noticeable results. 2 weeks ago it was fine and now i have an error 20. since i did not create the SSL certificate i have no idea what to do next? 0 LVL 13 Overall: Level 13 MS Server OS 3 Exchange 3 Outlook 1 Message Expert Comment by:jaynir2010-03-31 check this link and see if that helps http://support.microsoft.com/kb/923575 0 Message Author Comment by:xXWickedXx2010-04-08 The info is resourceful, however i do not understand what i am to do. Because i never dealt with ssl's other then installing them. Would it be easier for me to create a new certficate or update the old. This issue is causing huge problems for me. When i look at the CERT it says it is set to expire in 2013. So i have no clue how to trouble shoot this issue. 0 Message Accepted Solution by:xXWickedXx2010-04-15 I figured it out. It was an invalid SSL cert. Anyways thnx for all the help and suggestions. Great website.... 0 Message Expert Comment by:krytenlister2010-06-04 xXWickedXx are you able to post the solution ( or pointers where to look) as I have exactly the same issue. Thanks 0 Message Author Comment by:xXWickedXx2010-0
proxy server's security certificate. The name on the security certificate is invalid or does not match the name of the target site server.domain.com. Outlook is unable to connect to the proxy server (Error Code 10) The name on the security certificate is invalid or does not match the name of the site The cause of these errors is that Outlook is connecting using Outlook Anywhere although it is able to contact Exchange, it is using a name that is not on the certificate. To resolve the issue, there are two options. Either you need to create a new certificate request and add the name to the certificate (see here for instructions) or you need to configure Exchange not to autoconfigure Outlook with this name and specify a different name that is on the certificate. This autoconfiguration is known as autodiscover. More on that in another post. In this post, we'll look at how to configure Exchange Outlook Anywhere so that this issue no longer occurs. 1) Confirm current Outlook Anywhere hostnames We need to confirm that the Outlook Anywhere hostname includes the hostname in the error, in our case litex01.litwareinc.com. To do this run the below command: Get-OutlookAnywhere | fl ExternalHostname,InternalHostname 2) Create DNS records We need to choose a name that is included on the certificate that is used by the CAS servers and/or reverse proxies. In our case, we will use the same name, mail.litwareinc.com, in internal and external DNS as we are using split brain DNS. You can use different names as long as both are included on your certificate. Using a single name is simpler for troubleshooting and means that less names are required on the certificate which can reduce your costs in some cases. The internal A recordneeds to resolve to the internal IP of the CAS server or load balancer virtual IP if you are load balancing multiple CAS servers. The external A recordneeds to resolve to the public IP of the CAS server or load balancer virtual IP if you are load balancing multiple CAS servers. If you are using a reverse proxy then you need to configure the A record to resolve to the public IP of your reverse proxy. 3) Configure new Outlook Anywhere hostnames To configure Autodiscover Outlook Anywhere with the internal and external hostnames, run the command below on a single line: Get-OutlookAnywhere | Set-OutlookAnywhere -InternalHostname mail.litwareinc.com -InternalClientsR