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Exchange 1024 SSL update to 2048  EV SSL OWA

Posted on 2011-04-22
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Last Modified: 2012-05-11
We have Exchange 2003 Enterprise. I am upgrading the SSL cert for our default website in IIS 6. The current SSL certificate is 1024 bit. In order to renew with a 2048 bit using the same common name, friendly name, web site, etc. microsoft recommend creating a temp site, process the request and install the certificate then remove and replace in the default site (primary exchange services).

This all sounds good but does it work? I want to mimise downtime.

Is there any other considerations ie devices or browsers which will not supporting 2048 bit SSL.

Thanks in advance
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Question by:BerryGardens
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Expert Comment

by:praveenkumare_sp
ID: 35451424
This is the only solution to minimize the down time.

As removal so CERT and adding a new one will max take 30 seconds


if u want to minimize that go to Exchange virtual directory and uncheck "SSL Required" > do iisreset

after installing and doing all the changes check "SSL Required" > do iisreset

but the second option will take almost the same downtime as the first one
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Author Comment

by:BerryGardens
ID: 35452473
Won't this expose mail while SSL is unchecked?
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Expert Comment

by:praveenkumare_sp
ID: 35453192
ya agreed , as i mentioned in my first comment : the best thing that u can do is what Microsoft recommended you to do. that will have minimum downtime
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Author Comment

by:BerryGardens
ID: 35453436
I agree it sounds sensible to the letter (guaranteed way of fully testing the SSL prior to expiry). but I'm experienced enough to know this isnt always the a wise choice hence sites like experts exchange exchange org :) have you done this succesfully in live? because another consideration is the time it takes to process a new request upload it to a third party CA and wait for it to be approved and sent back. 5 mins + advice not worthy of the points sorry but least you agree.  
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praveenkumare_sp earned 2000 total points
ID: 35458058
i have done this in production :)

i created a 2nd website , created request file, gave it to the third party CA and when it got processed i downloaded it (all this time my primary website that has exchange running was not disturbed at all)

Once i got the certificate , went to the website that has exchange remove it , added the new certificate
(The BEST thing is that you dont need to do IISRESET so ur clients will not be disconnected)
this took me max of 30 seconds , just u need to click next , next finish

TIP: YOU CAN practice the removal and addition of new certificate in the new website that u created before doing it on production to make Ur self familiarize with the GUI
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Author Comment

by:BerryGardens
ID: 35458279
Well answered I did the same yesterday in test. I'll give it a go. Thanks for all the comments.
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Expert Comment

by:praveenkumare_sp
ID: 35458850
ur welcome berry :)
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