How to register same DNS name under 2 differnet IPs

Hi

We are using mail.company.com and mail2.company.com as our webmail
addresses, which is published and registered with ISP's DNS. To secure it we
are using wild card certificate, but facing problem with some Mobiles which
are not compatible with WildCard certificate. So our requirement is can we
configure mail.company.com which is pointing to 2 different IPs, so that we
can go for domain name certificate instead of wildcard.

Actually now we configured mail.mycompany.com on ISA01 and
mail2.mycompany.com with ISA02 on different IPs. If any technology like round
robin is possible in this case, then it would be helpful for us. So that we
can ask ISP's to configure like that.

Thanks in advance for your suggestions.
--
Server Management Team

In news:D75AC95F-5931-4A17-BA5D-3E22A87B0D97@microsoft.com,
Laljeev <laljeevm@newsgroup.nospam> requesting assistance, typed the
following:
> Hi
>
> We are using mail.company.com and mail2.company.com as our webmail
> addresses, which is published and registered with ISP's DNS. To
> secure it we are using wild card certificate, but facing problem with
> some Mobiles which are not compatible with WildCard certificate. So
> our requirement is can we configure mail.company.com which is
> pointing to 2 different IPs, so that we can go for domain name
> certificate instead of wildcard.
>
> Actually now we configured mail.mycompany.com on ISA01 and
> mail2.mycompany.com with ISA02 on different IPs. If any technology
> like round robin is possible in this case, then it would be helpful
> for us. So that we can ask ISP's to configure like that.
>
> Thanks in advance for your suggestions.


Are mail.company.com and mail2.company.com two different mail servers or
they both go to one? If two servers, do they both receive mail for the
company? If so, may I assume there are two MX records, and they are either
weighted the same, or 'mail' is set to a lower MX weight (so it is used
first) and 'mail2' is a higher weight (so it is used as second)?

Just use the one name, mail.company.com. Don't use two. This is less
confusing for all users to connect, whether Windows Mobile or OWA (webmail).
With one, you can use the two IP addresses on the public side, and ISA will
respond based on the array responding. If not sure how to setup an array,
see this:
http://www.isaserver.org/tutorials/C...er_Arrays.html

Get a non-wildcard cert. (I actually didn't know they offered wildcard
certs). For the cert to work with Windows Mobile, get one that Windows
Mobile supports out of the box of you will need to install a copy of the
root cert on each device. Here's a list that WM supports out of the box:
http://blogs.technet.com/vik/pages/t...d-devices.aspx

You can use two ISA servers and set them up in an array so they both respond
to requests under mail.company.com. Follow the instructions to setup ISA
2006 (you want to use the latest version of ISA for increased WM support)
to publish OWA. What versions of Exchange? I listed both...
http://www.msexchange.org/tutorials/...rver-2006.html
http://www.petri.co.il/publishing_owa_with_isa2004.htm

Now you want to support and publish ActiveSync for WM with ISA 2006:
http://www.isaserver.org/tutorials/P...006-Part1.html

I hope that gives you a good start.


--
Ace

This posting is provided "AS-IS" with no warranties or guarantees and
confers no rights.

Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCT
Microsoft Certified Trainer

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