0ffice 365 entry DNS settings

I have set up office 365 however would like to make a friendly name url to enter the home page or outlook.

so I have created a new subdomain mail.mydomain.com which I would like to point to amsprd9999.outlook.com as I guess this is the best access point to 365 (I have change the last 4 numbers for security(!))

So I created this subdomain (mail.mydomain.com) and pointed the Cname record to amsprd0502.outlook.com

however this does not work.

How do I set this subdomain up so that it will point to an appropriate entry point for office 365.

I am using 1and1 hosting so as well as mydomain.com I have also had to set up
autodiscover.mydomain.com and ms99999999.mydomain.com
Simon CrippsOwnerAsked:
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Simon CrippsOwnerAuthor Commented:
Jupiler, thanks for that however 1and1 does not allow the CNAME change to allow this. any solution for 1and1.
Sorry, not right away.
I'll look for it anyway.
Simon CrippsOwnerAuthor Commented:
I am closing this now as looking for a different approach to manage my requirements. Thanks for any help provided so far.

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Simon CrippsOwnerAuthor Commented:
Could not find solution so going to apply a work around
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