Bulk update the total retention of all the Sentinel table: From tedious manual steps to seamless bulk updates

Automate Total Log Retention of all tables in Microsoft Sentinel: From Tedious Manual Steps to Seamless Bulk Updates

In today’s cloud-first security landscape, operational efficiency is just as critical as threat intelligence. According to Forrester’s “State of Security Operations 2024,” nearly 65% of security teams cite time-consuming manual processes as a top roadblock to effective threat response. When compliance and security policies demand multi-year log retention, the task of updating hundreds of Sentinel tables individually can drag skilled analysts into hours of repetitive, error-prone work. This blog introduces a PowerShell script designed to automate this process, freeing up valuable time and resources.

Reality Check for Security Operations

• Is your SOC spending hours each quarter just setting total data retention policies of new tables or new table setup?
• Do auditors and compliance teams demand rapid, consistent evidence of log retention across all your workspaces?
• Ever worry that a missed click or oversight could lead to gaps in your data storage policy?

If any of these concerns hit home, it’s time to rethink your approach.

• As regulatory expectations rise and cloud data grows, you might find yourself with 200+ analytic and custom tables in Microsoft Sentinel - each requiring a configured “total retention” period. Doing this by hand in the Azure Portal can:Consume precious staff hoursLead to inconsistent resultsCause “change fatigue” in your security teamA large global bank recently estimated over 15 hours annually wasted on manual retention updates - just in a single workspace.

To empower your SOC and eliminate this manual burden, I’ve developed a robust, interactive PowerShell script. This script streamlines the process of updating total log retention of all the tables across your Microsoft Sentinel environment.

• Input your Azure subscription, resource group, Log Analytics workspace, and desired retention period - and the script will apply settings across all tables.
• Skip specific tables-want to retain only certain logs longer (or shorter)? Just supply their names and they’re automatically excluded.
• Token refresh logic ensures reliability - even for large environments, the script refreshes your Azure credentials in the background, preventing expiry errors.

Key Features & Benefits

• Bulk Automation: Update hundreds of tables in minutes, not hours.
• Zero Guesswork: Prompts for all needed information so no edits required.
• Flexible Exclusion: Easily skip system or custom tables when needed.
• Secure & Robust: Handles Azure authentication, token refresh, and error messaging.

User-Friendly Output: See exactly which tables were updated, skipped, or failed - for immediate operational clarity.

How It Works: Automated Total Retention of all tables in Action

• Step 1: Login to Azure Log in with Azure PowerShell for secure authentication and upload the script.
• Step 2: Run & Provide Details:
• Step 3: Customize Choose whether to skip any tables (simply enter a comma-separated list).
• Step 4: Push The script gathers your table list, loops through each, and sets retention - handling token refreshes automatically.
• Step 5: Review Results Success, skip, and error messages are color-coded and summarized in real-time.

Why This Matters

By blending automation with flexible policy controls, you ensure:

• Governance: Compliant retention across your entire Sentinel estate.
• Efficiency: Free up your engineers and analysts for threat hunting, not repetitive clicks.

Reliability: Consistent settings and robust error handling reduce risk of human oversight or missed updates.

Conclusion: Let Your Security Team Focus on What Matters

Manual retention management of all tables is a thing of the past. With this script, you can keep your Microsoft Sentinel deployment compliant, efficient, and reliably configured - with just a few prompts and no risk of missed tables. Empower your analysts to do what humans do best: investigate, respond, and defend - while automation takes care of the heavy lifting.

Ready to transform your Sentinel operations?

By: Pranjal Verma, Senior Technology Consultant, Microsoft Security, Inspira Enterprise