Oab files not updating

What happens if we are on the corporate network and are not domain joined or we are external to the network and don’t have AD connectivity?

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Because of this, Outlook will fall back to utilizing a different method.

The first method is to contact the following DNS records in order (domain = the user’s primary SMTP domain): Every client I’ve ever worked with leverages autodiscover.and does not rely on

There would need to be an A record for autodiscover which will lead the client to a CAS server. As I mentioned, the issue is that when you attempt External Autodiscover, you get a certificate error and see your Public Website’s Certificate, not the Exchange Certificate. When I am creating a new Outlook Profile, that is one point when Autodiscover will be contacted.

When you are in the process of Searching for your e-mail settings (aka utilizing Autodiscover), you see a certificate error as follows: If you click View Certificate, you will see your public website’s certificate.

I have a blog post on Outlook Certificate Errors which applies to Outlook 2007, Outlook 2010, and Outlook 2013. That blog post describes an incorrect certificate on Exchange itself.

For example, you make a connection to Exchange and your Internal URLs, External URLs, and Autodiscover Service Internal URI FQDN is not defined on the certificate.

So an example of how this works for domain joined clients who have access to Active Directory is included on the Autodiscover Whitepaper: A domain joined Outlook client (again, only Outlook 2007 or above clients use Autodiscover) will find this SCP record which will return the Autodiscover Internal Service URI you specify with Set-Client Access Server.

Again, don’t forget that it’ll get a list of all SCPs for all CAS servers in your environment and use one at random.

The certificate error that pops up shows you that it is finding the certificate on your company’s public website. Why the error and why is it showing the company’s public website’s certificate.

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