Certificate Error When Starting Outlook
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Neal (Exclaimer) Sales & Marketing Manager GROUP SPONSORED BY EXCLAIMER IN THIS DISCUSSION Microsoft Exchange Server 2010 EMC 397020 Followers Follow outlook 2003 certificate error Join the Community! Creating your account only takes a few minutes. Join outlook web access certificate error Now Hi All, This is a tricky one. I have been trying to find a resolution for a while. exchange 2010 outlook certificate error It just one of those things that get on your nerves as much as it gets on your users nervers so was hoping Spiceworks Community can giving me a helping hand https://support.microsoft.com/en-us/kb/2006728 please? Every time we open Outlook 2010 (regardless of who the user is or which PC) we keep getting a Security Alert Certificate Pop up twice (please see attached, I have censored our server name for security purposes). I have tried installed the certificate but it keeps coming back every hour or so or every time we restart Outlook. I have also checked the https://community.spiceworks.com/topic/278039-email-certificate-security-alert-everytime-opening-outlook-2010 certificate is valid and is covered for purposes of: -ensures the identity of a remote computer -proves your identity to a remote computer -2.16.840.1.114413.1.7.23.1 (Do not know what this is!) Exchange Setup: We have 2 Exchange servers. Server A & Server B. Server A was initially where exchanged was installed (which was upgraded from Exchange 2003 to 2007 by my predecessor), there was an issue with accessing OWA on server A during the upgrade so he installed Exchange 2007 on Server B and OWA was working. All mailboxes are stored in Server B (this is starting to sound like an exam question now ha? :) Any ideas? Reply Subscribe RELATED TOPICS: Exchange 2010 and Outlook 2010 Security Alert on launch Outlook Security Alert "Certificate is invalid..." Security Alert for Outlook 2010 & 2013   1 2 Next ► 28 Replies Serrano OP gone Nov 28, 2012 at 12:42 UTC This happened to us when we upgraded our mail server. The name of our server changed, and we had to get a new certificate issued. There are also a few steps that needed
Warning" dialog box with the message; The server you are connected to is using a security certificate that cannot be verified. The target principal name is incorrect. I clicked on "View Certificate" and installed the certificate, https://www.msoutlook.info/question/613 but I still get this dialog each time I start Outlook. Clicking "Yes" each time allows me to use Outlook as normal but how can get rid of this dialog? Usually you get this error http://serverfault.com/questions/341665/eliminate-certificate-warning-when-users-access-outlook-exchange-2010-on-split-d when you are using a shared hosting account with your own domain and connect via SSL. Another common cause is that your ISP has changed the name of their mail server and is redirecting certificate error you from the old server name to the new one and the name of the old server isn’t on their new SSL certificate. Looking at the certificate usually provides the answer. Name on the certificate should match the name of the mail server The solution is quite simple; click on the “View Certificate…” button and look at the “Issued to” name. This is usually the name that you’ll need to certificate error when specify for your incoming and/or outgoing server in your account configuration. In some cases, this still won’t work when the certificate holds multiple names. You can then select the “Details” tab and see if the certificate holds a field called “Subject Alternative Name”. If so, then you’ll find other names that you could try behind the “DNS Name=” value. If none of those names work either, contact your ISP and ask for the correct name of the mail server that you should use. Another (less secure) alternative would be to disable the use of SSL for your mail account. No need to install the certificate As long as the name on the certificate doesn’t match the name specified in your account settings, you’ll get this warning message. Installing the certificate will not help in any way and isn’t needed either. The only case in which installing the certificate is needed, is when the names do match and the certificate isn’t issued (trusted) by a Certificate Authority. These are so called “Self-Signed Certificates”. In that case, only install the certificate if you trust the domain that is specified on the certificate and if the administrator responsible for that domain has instructed you to do so. Background inf
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Eliminate certificate warning when users access Outlook/Exchange 2010 on split domain setup up vote 2 down vote favorite I have an internally-hosted Exchange 2010 Server with an internal domain, EXCHANGE0.COMPANY.COM. I have configured all users to access Outlook (even internally) using Outlook-over-HTTP. To do so I have set up a client access certificate for the externally-facing domain mail.company.com. The problem is that whenever users open Outlook they are promptly greeted by certificate warnings of the mismatch between mail.company.com and EXCHANGE0.COMPANY.COM. I would like to eliminate these warnings and I feel there is a way to do so either through DNS or through Exchange. I am just not sure what to do. AutoDiscover is configured using the SRV method if that matters at all. EDIT: Configuration on clients looks as follows Exchange Server: EXCHANGE0.COMPANY.COM Connect using Outlook Anywhere (HTTP): on fast and slow connections, connect to mail.company.com and only trust msstd:mail.company.com Name on certificate is mail.company.com, but Outlook was expecting EXCHANGE0.COMPANY.COM domain-name-system active-directory exchange exchange-2010 share|improve this question edited Dec 16 '11 at 16:36 asked Dec 16 '11 at 16:27 tacos_tacos_tacos 1,43653976 Can you clarify what the configuration looks like? Are the outlook clients configured to point to mail.company.com or exchange0.company.com? And what name is on the certificate? –Shane Madden♦ Dec 16 '11 at 16:35 This info has been added in the edit –tacos_tacos_tacos Dec 16 '11 at 16:37 Is it issued from an internal certificate authority where you could easily issue a new certificate with a subject alternate name? If not, then you may need to look at using a different IP address with an SSL listener with its own ce