An environment has one BlackBerry Enterprise Server, SQL2005 SP2 Standard. It has three Microsoft Exchange Servers: Exchange 1 has 400 BlackBerry device users; Exchange 2 has 300 users; and Exchange…

Question

Options

• A1
• B2
• C3
• D4
• E5

• A
  5% (2)
• B
  2% (1)
• C
  11% (5)
• D
  80% (35)
• E
  2% (1)

Explanation

D (4) is correct because BlackBerry Enterprise Server (BES) generates one BlackBerry Messaging Agent (BMA) per Exchange server, plus one additional BMA for every 500 users (or fraction thereof) beyond the first 500 on a given server. Exchange 1 (400 users) = 1 BMA, Exchange 2 (300 users) = 1 BMA, and Exchange 3 (600 users) = 2 BMAs (one for the first 500, one for the remaining 100) - totaling 4 BMAs.

Why the distractors fail:

• A (1) - Wrong: BES never collapses all messaging into a single agent across multiple Exchange servers.
• B (2) - Wrong: This undercounts; there must be at least one BMA per Exchange server (minimum 3).
• C (3) - This is the most tempting wrong answer - one BMA per Exchange server looks right, but it misses the threshold rule that splits Exchange 3 into two agents.
• E (5) - Wrong: Overcounts; no server here requires more than 2 BMAs.

Memory tip: Think "1 BMA per Exchange server, then add 1 more for every 500-user block above the first 500." Count servers first (floor), then check if any server breaks the 500-user ceiling.

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