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Certificate warning in Outlook

Posted on 2015-02-05
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Last Modified: 2015-02-05
Hi

We have On-premises Exchange 2007/Domain controller installed and Outlook Anywhere is "Disabled"

For some testing, When I try to configure Exchange online account in our office, it is giving error attached.

I understand that it is about AUtodiscover or Outlook anywhere issue of on-premise exchange server.

But in my case, I'm trying to setup "Exchange Online" ,not my premises exchange.

After further test, I notice it is actually giving warning for other domains (my friend's server)as well for autodiscovery which is working

Any suggestion what could be causing this ?
cert-error.png
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Question by:bominthu
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Assisted Solution

by:Simon Butler (Sembee)
Simon Butler (Sembee) earned 250 total points
ID: 40590774
If you are using the same domain for Office365 then you will have problems.
The client will query your internal Domain for Autodiscover information first, before trying to access the internet.

Autodiscover will also attempt to connect to https://example.com/Autodiscover/Autodiscover.xml.
Most web hosts will have an SSL site on the root of the web server, which will generate the error.

You need to get DNS sorted out. If the web host has Autodiscover enabled they need to turn that off.

Simon.
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Satya Pathak earned 250 total points
ID: 40590775
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Author Closing Comment

by:bominthu
ID: 40591433
Both of your comments were helpful.

Thanks
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by:bominthu
ID: 40591447
By the way I have a quick question. Sorry, not related to this issue.

When we configure Disclaimer for all incoming and outgoing email, I know we can use  transport rule to set.
In my Client server, the rule is not there but there is always a signature for "all outgoing email".
From where that Disclaimer could be coming ? Is there another place other than using transport rule ?

Thanks
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Expert Comment

by:Simon Butler (Sembee)
ID: 40591457
As the question is unrelated, you should ask it fresh.

Simon.
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