Hosted Exchange SSL issues

I'm using Microsoft's BPOS for hosted Exchange and have many users that just use the OWA interface.  Rather than go to red001.mail.microsoftonline.com, I setup a CNAME, mail.domainname.com to point to that address.

My problem is that when the user uses the mail.domainname.com, they get a certificate error.  If the user goes to red001.mail.microsoftonline.com, then no certificate error.  I called Microsoft a few times and they said they couldn't help me.

I would like to continue using the mail.domainname.com as it is much easier for the users to remember.  Any ideas?
SupermanTBAsked:
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Paul MacDonaldConnect With a Mentor Director, Information SystemsCommented:
It would have to be on the machine hosting Exchange.  The folks at MicrosoftOnline should be able to help you out.
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Paul MacDonaldDirector, Information SystemsCommented:
Since the SSL certificate is issued to the domain, you would need a certificate that validated against  mail.domainname.com as well as mail.microsoftonline.com.
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SupermanTBAuthor Commented:
That's what I figured.  Given the hosted exchange, I'm not sure where I would install the SSL certificate
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SupermanTBAuthor Commented:
Is that typically the way this is handled with hosted Exchange?  When I mentioned that to the Microsoft techs, they had no clue what I was talking about.
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Paul MacDonaldDirector, Information SystemsCommented:
I don't see any other way, though it may be the expect to host the domain name for you.  That may cost extra so they may be steering you in that direction.  Since they're the host, they get to make the rules.  

You could try bringing the issue up with your salesperson.  That person may have the answers already.
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shabbirjCommented:

The solutions is that you can buy a SSL cert, then go to IIS on the server where the OWA role is installed and import it in
after that you can create a basic web page with your domain name and hyperlink it to the red001.mail.microsoftonline.com
I have done this and it works fine
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SupermanTBAuthor Commented:
Forgive me if I'm misunderstanding you, but since this is hosted Exchange, I have no access to the server where the OWA role is installed.  Not sure how I would be able to do that.
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shabbirjConnect With a Mentor Commented:
The Simple solution is to create a single web page with your Domain info and a log in
button in the log in button on the HTML page embed the link

https://red001.mail.microsoftonline.com/owa/auth/logon.aspx?url=https://red001.mail.microsoftonline.com/owa/&reason=0

The user will browse to your domain page  eg. mail.yourdomain.com
then wen they click on the button they will be redirected to the above link
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SupermanTBAuthor Commented:
Ahhh, very clever.  That will work.  Thanks.
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