Email autodiscover issue

James Danahay
James Danahay used Ask the Experts™
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I have migrated a number of email addresses to the Office 365 platform. Occasionally some of the email accounts can't connect to the 0365 exchange server. If I do a test connection it looks for the local exchange server. If I do an nslookup for autodiscover@domainname on the same pc it finds the outlook.com ok.
If I replace the dns settings on the client pc from the internal dns server to an external (say google.com) it connects fine.
On the local dns server there is not autodiscover settings that I can find. Could the autodiscover settings be configured where the domain is hosted?
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Tej Pratap Shukla ~DexterServer Administrator

Commented:
Hi,
This error occurs cause of Autodiscover Issue, where the Outlook Profile has cached in Registry.
Just go through Below Link to know the resolution process to the Error.
https://support.microsoft.com/en-us/kb/3073002
James DanahayDirector

Author

Commented:
Hello

This didn't work unfortunately. After the reboot it reverted back to looking at the old auto discovery settings were still showing in the outlook connectivity test
Active Directory/Exchange Engineer
Top Expert 2015
Commented:
Your CAS server may be pointing to the on premise setup.  Use this command

Set-ClientAccessServer –Identity “YourCASservername” –AutoDiscoverServiceInternalUri $NULL

This command removes on premise information for Autodiscovery.

Good read below
ref link:http://prakash-nimmala.blogspot.com/2014/10/outlook-clients-are-still-pointing-to.html

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