Certificate for OA

Posted on 2013-01-21
Last Modified: 2013-01-29
Hi Guys,

I am about to purchase certificates for outlook anywhere but i am a bit confused.

Basically, we got 2 exchange 2010 servers located in different sites and both are in the same domain.

Now my question is, will a wild-card certificate work for my 2 exchange servers or do i need to purchase a certificate per server?
Question by:R2_D2
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LVL 37

Expert Comment

by:Jamie McKillop
ID: 38801571

A wildcard certificate will work fine, unless you have older Windows mobile devices or you have OCS2007 and need integration. If you have Windows XP clients that aren't at the latest service pack level, you also need to make some changes to the certprincipalname so that is uses msstd:*

If you choose to purchase a SAN certificate, you need at least and, provided only one of your sites is internet facing. If both sites are internet facing, you will need a third name on the cert for the second site.

LVL 49

Expert Comment

ID: 38804110
I wouldn't recommend using a wild card, although technically it works  it is sensibly harder to configure specially if you are not experienced

I would buy a SAN certificate and include all the needed URI in it

Author Comment

ID: 38805627
will it work if i install 2 certificates, one on each server ?

because  is cheaper rather than buying a  SAN or Wild-Card Cert.
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LVL 49

Expert Comment

ID: 38805638
no it won't you do need a SAN certificate (or a wild card)

san certificates are less than $100 a year
LVL 37

Accepted Solution

Jamie McKillop earned 500 total points
ID: 38805650
Yes, it is possible to use a single name certificate. You will need to have an SRV record created in your DNS zone for the autodiscover service.

Here is a script that will help you set it up -


Author Closing Comment

ID: 38830209
Yes that worked

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