I recently created the following CNAME record in our public DNS in order to allow our Office 2010 clients to automatically configure themselves for Office 365 (i.e. so we can use autodiscover).
Domain: autodiscover.(ourdomain).com Target: autodiscover.outlook.com
Unfortunately, after allowing over 48 hours for DNS to resolve (more than enough time) we still cannot use autodiscover.
NSLOOKUP reveals that "autodiscover.(ourdomain).com" resolves to "(ourdomain).com", rather than "autodiscover.outlook.com". The same happens with the other CNAME records pointing to "lync.com".
NSLOOKUP seems to resolve my three new CNAME records back to the root of our domain rather than to the Microsoft servers specified. This is exactly what I would expect to see if the CNAME records did not exist (as our wildcard CNAME record would then handle the unrecognized subdomains).
Why is the wildcard record apparently handling these requests if CNAME records for these specific subdomains do exist? Only the three CNAME records highlighted in red seem to be overridden by the wildcard record. The others are working correctly.
It seems this is more of a general DNS question than an Office 365 one.