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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