02-28-2007, 11:58 AM
Thumbs Must Hurt
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There is no physical limit to the number of users you can have on a BES. 500 seems to be a recommendation that safely ensures you will have sufficient performance on the server.
How many users you can have depends on a lot of things. I have talked to people that have over 1500 users on a single BES, and I have heard others that have only 500.
If your users are strictly email users, then you can probably far exceed the 500 recommendation. If your users receive a lot of attachments, then you may want to stay close to the 500 (you also have the option to run the Attachment Server on a different system which would allow you to have more users on the BES). If your users are heavy internet users or will access a lot of internal systems, then you may want to keep the number of users under 1000.
My suggestion is you start off with a single BES and keep an eye on the performance of the server. As you add users and you notice a decline in performance, then its time to add another BES. If you can afford a second server up front, I would put the Attachment server on it which should allow you to have more users on the BES.
Just my opinion... Your mileage may vary...