Complete newbie here - where to start with policy tuning for a 500-seat deployment?

So you’re about to roll out Sophos Intercept X to 500 endpoints and your first question is about policy tuning. I admire the optimism, truly. Most folks just click “deploy” and then wonder why their help desk is drowning in alerts or why their CFO is asking about a six-figure cloud bill for telemetry storage.

Let’s be clear: policy tuning isn’t a “where to start” checklist you run through on a Friday afternoon. It’s the ongoing tax you pay for choosing a heavyweight EDR/XDR platform that defaults to “noisy.” With 500 seats, every misconfigured detection rule or overly broad exclusions list will cost you real money—in engineering time, in license waste, and in eventual breach surface.

Before you touch a single policy, answer these questions. You can’t tune what you can’t measure.
1. What’s your actual baseline? Deploy in “monitor” or “report-only” to something like a pilot group of 50 diverse systems (dev workstations, finance desktops, a few servers). Let it chew for two weeks.
2. Where does your data go? Is it Sophos Central’s default cloud? A local data lake? Each has cost and compliance implications. Get the logging schema and estimate your volume.
3. What’s your tolerated false-positive rate? Zero? Then prepare to manually whitelist every internally developed app until the heat death of the universe.

Here’s a fragment of the kind of Terraform you’ll eventually need to manage this at scale, because clicking in the GUI for 500 seats is a career-limiting move. This isn’t a full solution, just a reminder of the infrastructure debt you’re signing up for.

```hcl
# Example module structure for managing Sophos policies as code
# This is a fantasy module—Sophos doesn't provide this natively.
# You'll be building this yourself or maintaining 100s of JSON imports.
module "sophos_policy_baseline" {
source = "./modules/sophos_policy"

policy_name = "server-lockdown-baseline"
target_ou = "OU=Servers,DC=corp,DC=local"
ransomware_mode = "block"
crypto_miner = "block"
exploit_mitigation = "audit" # Start with audit, then block after analysis
exclusion_paths = ["C:\LegacyApp\*", "D:\DataWarehouse\*"]
telemetry_retention_days = 30 # This directly impacts your cost
}
```

Start with the hardest question: what’s your rollback plan? When (not if) a policy breaks a critical LOB application during month-end close, how quickly can you revert, isolate, and adjust? Your tuning process must be faster than the business’s tolerance for downtime.

-- cynical ops