"Certificate Error" in email

I am now starting to get a "certificate error" signal when logging into my comcast email account. How can this be fixed ? This just started last week.

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HT201320 since upgrade to iOS 6.1.2 On Ipad i am getting email server certificate errors

since upgrade to iOS 6.1.2 On Ipad i am getting email server certificate errors
Is there a fix for this?

Reach out to your provider. They would be responsible for maintaining any certificates associated with the account.

I am getting a certificate error message and there is no link on the page to add this site as an exception.

I am trying to open up the web page where we log into our employee email. Evidently the security certificate has been changed. I am getting a certificate error message, but I am not seeing a link provided where I can click to add this web site as an exception.

This is a user to user forum. You are defintely in wrong place.

Autodiscover, domain controllers, and certificate errors

I have just deployed and Exchange 2013 server in one of my sites. I'm having tons of issues with it, but one issue I'm having trouble thinking through goes like this:
All users have email addresses that are [email protected] Domain.com is our internal domain name and also a public domain. Now, in a Windows environment, if you were to nslookup domain.com within our network it
will resolve to any one of the domain controllers. On our infrastructure master DC there is an IIS website, with SSL, that handles certificate services for our internal CA.
Here's my problem: When a user opens Outlook and autodiscover attempts to find their Exchange connection info it first tries to reach the site
https://domain.com/autodiscover/autodiscover.xml. If that PC happens to resolve domain.com to the DC that has our certificate services website on it then the Outlook client sends a certificate error.
If the client is prior to Outlook 2013, the mailbox configuration just halts and throws an error.
What do I do to prevent this?

Hi,
Yes, we can have the following “switchers”
PreferLocalXML
ExcludeHttpRedirect
ExcludeHttpsAutoDiscoverDomain
ExcludeHttpsRootDomain
ExcludeScpLookup
ExcludeSrvRecord
ExcludeLastKnownGoodUR
Thanks,
Simon Wu
TechNet Community Support

Best practice for licence server for RDS Farm & Certificate errors

Hello,
I am in the process of creating an RDS farm using Server 2008 R2. I have three Session Hosts and a Connection Broker.
I have a set of 10 user CALs available and also another 20 on our current RDS server which will need migrating once we go live with the farm.
I understand the User CALs need to be installed on another Server 2008 R2 and I am wondering what is best practice. We are running on an entirely virtual environment and it would be simple enough to create another server and install the CALs on there.
The only issue with that is that I would need to create a replica of this new machine for DR purposes, but this would take up valuable space which may not be necessary.
We are planning on creating replicas of one of the Session hosts and the broker for DR, so I am guessing I would need to install some CALs on the Session Host which is going to be replicated.
There are a few options and I am just wondering what is the best way to go about things.
Also, as an aside, I am getting an annoying certificate error each time I log a test user onto the RDS farm - I think this is because I am using the DNS alias of the RDS Farm to log on. Is there an easy way to get around this, other than the 'Do not show
this message again'. I have been doing some research and the world of Certificates is very confusing!!
Thanks,
Caroline
C.Rafferty

Hi Caroline,
Firstly for your License related issue, you can perform the step on any VM or can create the new VM as replica for RDSH server also. But please be sure that you have installed RD License server on it, activate it and then install RDS CAL on it. But be safe
if possible don’t install RD License server with RDCB, please make that out of it as little away. As you can also install RD License server with AD or make replica of that and install RDL on that.
Best practices for setting up Remote Desktop Licensing (Terminal Server Licensing) across Active Directory Domains/Forests or Workgroup
http://support.microsoft.com/kb/2473823
What’s the specified certificate error which you are receiving?
If you're going to allow users to connect externally and they will not be part of your domain, you would need to deploy certificates from a public CA. In meantime you can refer blog for getting insight for certificate case.
Certificate Requirements for Windows 2008 R2 and Windows 2012 Remote Desktop Services
http://blogs.technet.com/b/askperf/archive/2014/01/24/certificate-requirements-for-windows-2008-r2-and-windows-2012-remote-desktop-services.aspx
Hope it helps!
Thanks.
Dharmesh Solanki
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]

Get certificate error trying to access yahoo mail, and there is no exception to bypass the error.

I am getting a certificate error trying to access https://mail.yahoo.com. Unlike most other certificate errors, there is no option for "I understand the risks" to add an exception for the page, just the following:
mail.yahoo.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. (Error code: sec_error_unknown_issuer)
I tried setting the proxy to "no proxy" under Advanced settings, as well as clearing all cookies and other cache history. Did not resolve the problem. I cannot access my email.

hello, which security program is running on your computer?

Certificate error

Hi,
We have had to update our ssl certificate on our SharePoint site to use Sha2. Even though this has been done, there are certain sections of the site that are still giving certificate errors. Here is the error that I am receiving: ( I have verified that the
document being referenced is located on the same portal.
Content was blocked because it was not signed by a valid security certificate.
For more information, see "Certificate Errors" in Internet Explorer Help.
And IIS restart and a server restart were done but still we are receiving this error. There is a search server in the loop but it does not use HTTPS. Any ideas of where else I can look?
There are two cases where this error is occuring:
1) certificate errors when accessing documents from a site collection within the main site collection. It seems this site collection is still in SP 2010. It did not get upgraded when we did the upgrade to 2013 a couple
of months ago. We were able to access documents here prior to applying SHA2 certificate.
2) If a document is embedded in an iframe there are certificate errors. But if I brows directly to the document I have no issue.
Sherazad

Hi,
To narrow down the root cause of the issue, I'd like to collect the following information:
1. Which browser are you using, IE browser or other browsers, 32bit or 64bit? Upgrade the Internet Explorer version to latest.
2. Have you added the site URL to the trusted sites? To do so, on the Tools menu in Internet Explorer, click Internet options,
click the Security tab, click the trusted sites zone, and then click Sites.
To fix your issue:
1.To clear the certificate error, go to Tools –> Internet Options from the menu of Internet Explorer(IE).
2. Click on the Advanced tab and scroll down to the security section. Clear the boxes for: “Check for publisher’s certificate
revocation” and “Check for server certificate revocation”.
3. Click Apply and Ok. Restart Internet Explorer to see if the certificate error problem is fixed.
Refer to the following links:
http://www.ehowstuff.com/how-to-fix-content-was-blocked-because-it-was-not-signed-by-a-valid-security-certificate-on-internet-explorer/
Besides, here are two similar issue, you can use as a reference:
http://community.office365.com/en-us/f/155/t/167327.aspx
http://stackoverflow.com/questions/681695/what-do-i-need-to-do-to-get-internet-explorer-8-to-accept-a-self-signed-certific/2955546#2955546
Best Regards,
Lisa Chen
Forum Support
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact
[email protected]
Lisa Chen
TechNet Community Support

Getting certificate errors using hotmail

I'm getting certificate errors intermittently when using hotmail. This has been happening for the 3 days I've had my Mac.
Here's the error:
Safari can't verify the identity of the website "secure.shared.live.com".
The certificate for this website is invalid. You might be connecting to a website that is pretending to be "secure.shared.live.com", which could put
your confidential information at risk. Would you like to connect to the website anyway?
It looks like from the specific certificate error, it's a problem with "secure.wlxrs.com" (whatever that means).
Anyone have any ideas on what this is all about and how to remedy it?
Message was edited by: john114

Hi pbwpu,
Thanks for posting. Are you still having this problem? Can you post a screen shot of the message you're seeing? Give us as much detail as possible and I'm sure we'll be able to help.
Cheers
David
BTCare Community Mod
If we have asked you to email us with your details, please make sure you are logged in to the forum, otherwise you will not be able to see our ‘Contact Us’ link within our profiles.
We are sorry but we are unable to deal with service/account queries via the private message(PM) function so please don't PM your account info, we need to deal with this via our email account :-)

Sudden Certificate Error

I've used version 4.0.1 of the Email app for the past couple of years to access my secure IMAP server. About a week ago, attempting to connect resulted in a certificate warning error due to a mismatched hostname. The host is a real one, but not one that has anything to do with my IMAP provider.
The IMAP provider says this server's certificate is fine. Other clients (Thunderbird, Apple Mail) do not show this warning. A web-based SSL checker (e.g., https://www.sslshopper.com/ssl-checker.html) does not show the bad hostname at all.
If I install another e-mail client (e.g., K9), it also shows the bad hostname in the certificate. Basically, any e-mail client on the phone shows this certificate error.
The hostname error still occurs after I clear credentials in Settings. The IMAP server resolves to the same IP address as on my other computer (on which e-mail still works), so I'm still trying to connect to the right server.
Is there any malware which could hijack an IMAP SSL session to insert a bad cert?
Short of wiping the phone and starting over, does anyone have advice how to figure out what's going on here?

If the nslookup fails you do have a DNS issue.
As SSL never was properly standardized in a proper RFC there is a little bit of wiggle room on the details in different implementations. It is clear that the SSL stack should do some kind of server identity checking but the exact method is not defined. (for example check the "server identity" section in RFC 2818.)
It might be that the SSL stack gets the server name parameter from some header field rather than through a reverse lookup. Common in the HTTP case and I guess you could do the same on the LDAP connection string. A little less secure but a lot more straightforward.
I would recommend opening an SR with Oracle and ask them how the server identity checking is implemented. You also really need the sniff to figure out what is going on.
My guess is that someone played around with the DNS records of your production AD machine without informing you.
Good luck
/M

Yosemite Mail 10.10.2 - SSL port, Certificate not trusted, email can't be seen

Hi All,
Thanks in advance for your help.
I have just upgraded (quite regrettably) to Yosemite 10.10.2 with a clean install (Time machine... that's a whole new bag of tricks hasn't worked can't even reinstall mail via TimeMachine RESTORE.. very helpful apple)
Mail – The simplest of software, is causing no end of problems:
PROBLEMS:
1) When mail opens, it kept saying "Certificate for this server is invalid"
2) The 2 email accounts I have, keep going offline? NEVER had this on any of the macs i've had set up before ran 10.6.8 for ages not a blip?
3) And another glorious trick, even if the email accounts aren't showing any exclamation marks (about being off line)
I select any mail box AND out of nowhere, no emails show in the mail boxes, where only 10 seconds ago they were all there?
4) REPLY ALL just a few moments ago DIDN'T work or reply to all
NOW, it either replies to ALL including me (the original sender) OR it'll place the original sender email address in TO and all others in CC? when all emails were in the TO field?
Just to be clear: I have set up 2 email accounts as IMAP on the mac (Say email X and email Y), and have tested by sending an email FROM email X TO email Y and a hotmail account, just to have more than 1 email address in the to field to see what happens with the REPLY ALL. It doesn't work suffice to say
SOLUTIONS TRIED BUT NOT WORKED SO FAR
I have scoured the forums and tried a few suggested things
1) I have 2 email accounts, both of which I'm setting up as IMPA, my ISP Tech support for email host has said "Set the SSL port to 587"
– Tried doing that in 2 places
a) Mail > Accounts > (select email account) > Advanced There under PORT stated 587
b) Mail > Preferences > Accounts (select account) > Advanced > PORT And here it is NOT the stated 587, it's (currently) 143?
(I've tried changing this to 587) and this doesn't solve the problem(s)
2) I tried UNTICKING "automatically detect and maintain account settings". but this didn't solve anything, and the whole certificate error and Mail going offline started up pretty much instantly
3) Tried ticking the "Allow Insecure authentication" - Again, no solution?
4) I did have my gmail account set up, but took that out of the equation as that wasn't helping, and with that I couldn't hit REPLY ALL and it show up in the TO field????
I appreciate this is a lot of information on the screen, but i've tried to be as through as I can, and seriously I CANNOT believe Apple have managed to mess up a corner stone app that should Just work?
Thanks agin for any help or pointers.
Mypetshadow

CAVEAT:
1)I'm not technically qualified, but thought i should share the info I have found that works for me after having a tech guy from the ISP sort out the settings to get my main running:
2) This has been working for all of 2 hours... lets hope it stays that way.
3) My emails are set up as IMAP accounts.
So....
After speaking / emailing with my ISP and after 4 days of what seems like ****... (Seriously, thanks Apple "it just works.... like a hole in the head") I have a few solutions that are working for me and thought I would post them up for people who maybe having the same difficulty...
SSL PORTS AND CERTIFICATES ISSUE
1) Once you "CREATE' an email account, you have to adjust the settings manually (No surprise there)
• There are some people saying you have to UNTICK the "Automatically detect and maintain my account settings"
• (I'm NOT a techie kinda guy), BUT in my case I LEFT THIS CHECKED (on advise from the ISP tech guy), and for me it is working. The tech guy from my ISP said something on the lines of "If the PORT is 993 then SSL has to be checked, If it's port 143 the SSL IS UNCHECKED"
Again, i'm not a techie, but this may be of relevance to you.
Screen grab of the main IMAP settings page
2) EDITING the SMTP settings
• MAIL > PREFERENCES > ACCOUNTS > select your newly created account > ACCOUNT INFORMATION TAB
– From the OUTGOING MAIN SERVER Dropdown list, Select EDIT SMTP SERVER LIST and change your port to 465 (note: Originally port was 587... read below)
Here, SSL WAS CHECKED, as was "Automatically detect and maintain account settings".
REPLY ALL MOVES EMAILS INTO THE CC FIELD
• Originally the port was set at 587 BUT I noticed a glitch; when I hit reply all, this would put all email addresses that were in the TO field into the CC field? (excluding the original sender...) Not helpful.
• I noticed (in an earlier mess up and moving around of ports etc) that when the port was changed to 465 (another port that the ISP tech guys said was an option) my email started behaving as expected... emails in the TO field stay in the TO field, as expected. and not placed in the CC field
Screen grab of the SMTP edit page:
Right, that's my non-techie tuppence and hope that it is of some help, and if not specifically all you need, it might give a few clues.
Cheers

Certificate error on Outlook 2013 clients, Outlook 2007 clients do not get certificate error, Exchange 2010, dot local domain name

Hi
I'm looking for a solution that I can't seem to find. I have an Exchange 2010 server running in a dot local domain (domainname.local), so my SSL certificate is installed using the servers external email DNS name. email.mycompany.com
I have followed the instructions to resolve this on the Exchange server, implemented the changes so autodiscovery sees the server as email.mycompany.com. This works great for my Outlook 2007 users. The downside is that none of my Outlook 2013
clients can access their email without the certificate error server name mismatch.
I know Outlook 2013 has tighter security but I need to get rid of these cert errors, any thoughts out there?

Hi,
Since both your Outlook 2007 users and Outlook 2013 users are using Exchange 2010 with the same server configuration, it should be working in both Outlook client version.
Please restart your IIS service by running IISReset /noforce from a Command Prompt window in Exchange to have a try. In Outlook, please re-create a Outlook profile to check whether the issue persists.
Regards,
Winnie Liang
TechNet Community Support

Exchange 2007 Out of Office Certificate Error

Hello,
I have an Exchange 2007 Server and for some odd reason this week, we have been having issues enabling Out of Office in Outlook. It is some sort of issue with the Autodiscover service, but despite reading forum post after forum post, nothing has worked for
me. At first when we would go into Outlook and click on Out of Office, it would freeze and then say the server is unavailable. I realized that it was trying to resolve a URL so I added a manual A record in the DNS server pointing to the local IP of the server
and it fixed the issue, kind of. Now when we click on Out of Office Assistant, we get a security certificate error and it is driving my users crazy. I have updated the SRV record and many things, still unable to get it to work.
Any help would be super!!
Thanks!

Hi,
1.First of all please check the name what you are using for autodiscover service is available on SAN certificate.
2.Please check the name resolution is happening for autodiscover namespace.
I.e if you try to resolve autodisccover.mydomain.com (or) mail.mydomain.com in your problematic PC it should have to resolved in to cas server ip address or in some scenarios it will get resolved in to LB
3.Then please check whether you have properly set the autodiscover internal URL in all the cas servers.
It might be like below
https:\\autodiscover.mydomain.com\autodiscover\autodiscover.xml
(or)
https:\\mail.mydomain.com\autodiscover\autodiscover.xml
4.Then please check for the web services url in all the cas servers and that is the major thing which will make the availability services (i.e OOF,free busy lookup) to work perfectly .
5.In the problematic please uncheck the internet proxy exceptions.
6.You cane use test email configuration to check whether the outlook client is fetching up the proper url for autodisocver and ews .
7.test-outlookwebservices (we can use this command to check the fuctionality of autodiscover for an problematic user account)
8.Please check the root certificates in the problematic client to check whether it is a expired or not .Root certificates is nothing but the one which will come by default with OS .
9.If all the above is set as perfect but still you are facing the issue.Please follow the below one and this may be not required.
Please export the san certificate from exchnage to pfx file which should have to include the certificate key by using MMC.Then import the pfx file in to problematic client .Let us see what happens .
Same on my side i am having few questions about your environment .
1.Are you facing any certificate errors in OWA .Because why i am asking please check the installed SAN certificate in exchange is valid and or it is not expired ?
2.what is the problematic client operating system veriosn?
Please reply me if you have any issues .
Regards
S.Nithyanandham

I get a certificate error using firefox, I have tried deleting cert8.db, and resetting Firefox. I don't have any errors using IE 10. What can I do?

I used a link in an email to check the status of a repair from Acer and received the error "customercare.acer.com uses an invalid security certificate.
The certificate is not trusted because no issuer chain was provided.
(Error code: sec_error_unknown_issuer)". I tried going directly to the Acer website, and went to support, then to check case status. I received the same error. I reactivated IE 10 on my OS and had no problems with certificate errors. I use McAfee Antivirus suite from ATT Uverse, but the troubleshooting did not indicate any settings for that, only ESET and Bitdefender.

Could you take a look at the certificate details?
If you click "I understand the risks" and "Add Exception", then the "View" button, does it look at all like the attached? I suggest using a new window to compare because when the certificate viewer is open, you cannot switch tabs in the same window.
You can cancel the viewer after checking, you may not want to create an exception until getting further comments.

Certificate Error while Installing Windows Live Me...

I have nokia N86 which is not from UK , my phone's network is 3 which is providing free Windows Live Messenger & Skype which Iam not able to install in my phone because it is not 3 branded, I tried contacting 3 but they cannot help me because Iam using non 3 branded phone. I know the reason of certificate error it is because the two Hutchinson certificates which helps to install this apps are not present in my phone, So is there any way to solve this problem? How about If I flash it from nokia service centre?? will they install those certificates? Please help me.
Thank you!
Regards
Lover101

Hi,
On current situation, please refer to following KB and check if can help you.
"A required CD/DVD drive device driver is missing" or "A media driver your computer needs is missing" error message when you install Windows
In addition, please check your system BIOS settings. Please refer to following thread and check if can help you.
A required CD/DVD drive device driver is missing.....
Best regards,
Justin Gu
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]

Outlook certificate errors from certificate on DSL modem.

Hi,
I have a client running Office 365 Small Business on a mix of Outlook 2007 and 2010 installs. We are getting certificate errors when using Outlook, and upon further investigation, I've found that the certificate it is seeing is from the DSL modem, showing
Issued To: gateway.pace.com. I'm not working with a domain, I've double-checked everything in the DNS settings in-house and for the domain name. Also, the domain name is not in any way pointed to or set on the modem.
Any help will be greatly appreciated!
Thanks,
Eric

Hi,
Is that different server an Exchange server? In the local Outlook 2013, please run Test E-mail AutoConfiguration tool to check if any services are using that namespace for service request. To run the tool, please do:
please open Outlook - press CTRL key - right click on the Outlook icon from right bottom corner taskbar - Test Email AutoConfiguration. Put your email address - uncheck use guessmart and secure guessmart authentication - click Test to check your Autodiscover
service.
Then check the Results tab and Log tab for service namespace.
In IE, please check the following settings for LAN:
Click Settings > Internet Options > Connections > LAN settings, please make sure there is no proxy server set there. Only “Automatically detect settings” option is checked.
Regards,
Winnie Liang
TechNet Community Support

"Certificate Error" in email

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