The outlook security certificate error arises when the security certificate used by your email server has expired or becomes invalid. The Outlook certificate error means that the security certificate that your connected server was using cannot be verified. Moreover, this also means that there are no prior certificates available before the expiry period.
There are two aspects of updating the certificate: If you are an administrator, you need to update a new certificate. Whereas, if you are an end-user, then you may ask your admin to update the certificate. For a non-technical user, the error may seem hard to configure, but it is safe to click OK to the error message dialog box.
So, in the next section, we will understand why does the Outlook certificate error occurs.
While working with the IMAP Outlook account protected by Secure Socket Layer, many users encounter the pop-up message which says Internet Security Warning. That means that the server you connected to is unable to verify the security certificate. Other problems are:
The easiest way to fix the Outlook certificate error is to change the server name; if it is allowed by your mail provider.
The following procedures help to fix the security certificate error in Outlook by renaming your IP address. But first, you must know your IP address:
To know your server IP address:
To justify the Outlook certificate error, you need to set the correct target principal name. Follow the given steps:
By the above procedure, you can solve the target principle name from both ends. If you are using a wildcarded certificate, the hosts file entry can be changed to preferred name.edc.co.nz. The wildcard will cover the name.
Sometimes this error occurs while you opening a corrupted OST file in Outlook. To overcome such a situation use Sysinfo OST Recovery.
The Outlook certificate error occurs when the name of the server and the certificate name remain unmatchable. Correcting the target principle name will help in diverting the mail server traffic directly to your mail server. Until your mail provider uses the valid certificate authority, the certificate will get trusted by itself. If you again encounter the error, then reconfigure the incoming and outgoing mail servers.
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