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From: Luca on 10 May 2010 08:23
Hi,
Due to a joint venture we will soon need to create 19000 mail-enabled
"Contacts" in our AD & Exchange infrastructure (both 2003), we have 17
locations around the world and a central Exchange infrastructure supporting
around 8000 users worldwide, all DCs around the world are global catalogues.
Questions:
I was wondering if this mass contact generation will create a huge AD and
Outlook address book download traffic ?
If yes, are there any ways to limit or to control that ?
Is there any way we can calculate or estimate the impact ?

Your responses/suggestions are most welcome, and thanks.
Luca

From: Rich Matheisen [MVP] on 10 May 2010 08:34
On Mon, 10 May 2010 05:23:01 -0700, Luca
<Luca(a)discussions.microsoft.com> wrote:

>Hi,
>Due to a joint venture we will soon need to create 19000 mail-enabled
>"Contacts" in our AD & Exchange infrastructure (both 2003), we have 17
>locations around the world and a central Exchange infrastructure supporting
>around 8000 users worldwide, all DCs around the world are global catalogues.
>Questions:
>I was wondering if this mass contact generation will create a huge AD and
>Outlook address book download traffic ?

I guess that depends on your definition of huge. Adding mail-enabled
objects to the AD will increase the size of the OAB and there will be
a good deal of download traffic between the Outlook clients and the
Exchange servers with copies of the OAB folders. The size of your DIT
file will also increase and there will be additional replication
traffic.

>If yes, are there any ways to limit or to control that ?

Don't add them all at once. Split the updates into smaller chunks and
do one section a day.

>Is there any way we can calculate or estimate the impact ?

If you know how big your OAB is today, and you know how many objects
it contains, you can get a fair idea of how big the OAB will become by
adding an additional 19K objects. The same is roughly true of the DIT,
but that's a database and contains whitespace so thake that into
account.

Are the contacts being added to mail-enabled groups? The membership of
the groups may be a problem if you're not running Win 2003 R2 on the
DCs.
---
Rich Matheisen
MCSE+I, Exchange MVP
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