Cloning ServiceNow Instances: What Gets Copied and What Gets Wiped

Cloning is how you refresh your sub-production (dev/test) instances with production data. But not everything clones cleanly — and finding out after the fact causes problems. Here is what to know before every clone.

What is an instance clone?

A clone copies a source instance (usually production) to a target instance (usually dev or test). The target's database is replaced with the source's database. This gives your dev/test team a fresh copy of production data to work with.

What IS cloned

  • All database records (incidents, users, CIs, configurations)
  • Custom tables and their data
  • Update Sets in the source instance
  • Attachments (configurable)
  • All custom code (Business Rules, Script Includes, etc.)

What is WIPED by default

  • Integration credentials (HTTP credentials, OAuth tokens)
  • Scheduled job execution history
  • Email configuration (send is disabled post-clone)
  • MID Server credentials
  • Encryption keys (configurable)

Clone excludes (protect your dev config)

Before cloning, set up Clone Excludes for things you do NOT want overwritten. Common excludes:

  • Your dev Update Sets (the clone would wipe them with prod's sets)
  • Dev-specific integration endpoints
  • Test user accounts

Navigate to System Clone > Exclude Tables and Exclude Records to configure.

Post-clone checklist

  1. Verify email sending is disabled (System Properties > Email)
  2. Reconfigure integration credentials
  3. Restart MID Servers and reconfigure credentials
  4. Set your current Update Set
  5. Verify scheduled jobs are paused or redirected appropriately
  6. Test critical integrations against test endpoints, not production

Clone frequency

Most teams clone quarterly or before a major development effort. More frequent clones give developers fresher data but require more post-clone reconfiguration effort.

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