Outlook Proxy Server Error
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There Is A Problem With The Proxy Server's Security Certificate Error Code 10 Exchange 2013
Sign in to vote Hi, I am getting an error message when I started the Outlook. The message is
Outlook Is Unable To Connect To The Proxy Server Error Code 0 Exchange 2013
as follows, There is a problem with the proxy server's security certificate. The name on the security certificate is invalid or does not match the name of the target sitemail.abc-company.com. Outlook https://support.microsoft.com/en-us/kb/923575 is unable to connect to the proxy server.(Error Code 10) I Use TMG 2010 as my proxy server for the internet andI need some help on this one to fix this. Can someone tll me how to fix this issue? Thanks Yosh,--------------------------------------------------------------------------------- YOSHIKA04 ------------------------------------------------------------------------------ Friday, March 25, 2011 5:23 AM Reply | Quote Answers 0 Sign in to vote Hello, Firstly, https://social.technet.microsoft.com/Forums/exchange/en-US/980846f8-e616-4150-9f6a-eaa85f06a76d/outlook-gives-an-error-for-proxy-server-certificate?forum=exchangesvrclientslegacy I would like to ask whether the symptom occurs on an Internal Outlook client or an external Outlook client. If it occurs on an External Outlook client, I think we are using Outlook Anywhere and we have to add the “mail.abc-company.com” to the domain names in the certificate. If the error occurs on Internal Outlook, we can workaround this issue by turning off “Outlook Anywhere” by: 1. On a problematic Client, open Outlook. 2. Click Tools >> Account settings. 3. Double click the profile name and click More Settings. 4. On the Connection tab, uncheck on “Connect to Microsoft Exchange using HTTP”. 5. Save the changes and restart the Outlook to check this issue. Thanks, Simon Marked as answer by Serena Li Sunday, April 03, 2011 3:44 PM Monday, March 28, 2011 1:48 AM Reply | Quote Moderator All replies 1 Sign in to vote You need a valid certificate on both the Exchange server and on the TMG server. How you accomplish that depends on your version of Exchange, and you didn't share that with us.Ed Crowley MVP "There are
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 http://markgossa.blogspot.com/2015/10/outlook-2013-there-is-problem-with-the-proxy-servers-security-certificate.html 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 http://msexchangeteam.in/there-is-a-problem-with-the-proxy-servers-security-certificate/ 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 proxy server 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 the proxy server 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 -InternalClientsRequireSsl $true -ExternalHostname mail.litwareinc.com -ExternalClientsRequireSsl $true -ExternalClientAuthenticationMethod Basic 4) Confirm new Outlook Anywhere hostnames Again, we'
» There is a problem with the proxy server’s security certificate By Sunder | August 30, 2013 - 3:42 pm | Tips & Tricks Recently I was working on a project and I came across with the below error message for roaming users. I was not able to configure outlook profile remotely. While configuring the profile you will get this below error message. Figure : 1 Error MessageThe problem occurs when you have Exchange Certificates from an Active Directory Certificate Authority. Solution: You have to download the certificate from Exchange and Install them manually on each client machines who are not a domain joined users. To install Certificate on client machines follow the below steps. Copy the certificates which you have exported from Exchange Server to the client machine. From Client Machine Go to Start > Run > type MMC > and then Enter Figure 2 : MMC Console Figure 3 : Options to select In figure 3 Select Add/Remove Snap-in… Figure 4 : Steps and Options to Select Figure 5 : Import Certificate on Local Computer Figure 6 : Import Wizard Figure 7 : Browse and Select the Cert Figure 8 : Selecting Certificate Store Click Finish in the final window. Repeat the steps from 5 though 8 forTrusted Root Certificate and for Intermediate Certificate Authority. Post which you should be able to configure outlook profile from a remote location. Hope this information was useful. ============================ Sunder MSEXCHANGETEAM Share this:FacebookGoogleMoreEmail Tagged Outlook 2010, Outlook 2013, Outlook Anywhere, Outlook Anywhere Proxy Settings, Outlook Connectivity. Bookmark the permalink. « Transport Connectivity Log – Exchange Server 2010 Transition from Exchange Server 2003 to Exchange Server 2010 – Part 1 » 6 Responses to There is a problem with the proxy server’s security certificate Gulab Prasad says: September 24, 2013 at 12:46 pm So, it's a workaround and not the resolution! How would I fix it, if I have large number of clients? Sunder says: September 24, 2013 at 1:54 pm Gulab If they are domain joined users then Group Policy will help you. If they are not domain joined then only manual process. Pooriya says: September 6, 2014 at 8:50 pm I got the same error and used the solution which solved my problem. After this I acquired a third party public certificate a