Looking for a Complete ServiceNow ITOM Repository – Real-Time Projects, Troubleshooting Scenarios, U

[VamshiPeddapall]

Hi Experts,

I am looking to gain end-to-end expertise in ServiceNow ITOM and would appreciate recommendations for a single comprehensive source (or a few key sources) that cover:

• CMDB Fundamentals & Best Practices

• Discovery (Windows, Linux, Network, Cloud)

• MID Server Architecture & Troubleshooting

• Identification and Reconciliation Engine (IRE)

• Service Mapping

• Event Management

• Operational Intelligence (OI)

• AIOps / ML Concepts

• Cloud Discovery (AWS, Azure, GCP)

• ITOM Visibility

• ITOM Health

• ITOM Optimization

• Common Real-Time Implementation Projects

• Production Support & Troubleshooting Scenarios

• Interview Questions & Answers

• Architecture Diagrams

• Discovery Patterns & Probes/Sensors

• ECC Queue Troubleshooting

• CI Relationship Mapping

• Integration Scenarios

• Best Practices from Real Implementations

I am specifically looking for content that includes real-world project experience, troubleshooting cases, lessons learned, and practical implementation guidance rather than only theoretical concepts.

Could anyone recommend:

1. Community posts

2. Blogs

3. YouTube channels

4. GitHub repositories

5. Learning paths

6. Documentation collections

that together provide an end-to-end ITOM learning journey?

Thank you in advance.

[Tanushree Maiti]

Hi @VamshiPeddapall 

Regarding ITOM interview Questions:

🚀 ServiceNow Discovery & CMDB Interview Questions and Answers (2025)

https://www.servicenow.com/community/developer-articles/servicenow-discovery-amp-cmdb-interview-ques...

https://www.multisoftsystems.com/interview-questions/servicenow-itom-interview-questions-answers

https://www.servicenow.com/community/cmdb-forum/guidance-needed-preparing-for-interviews-cmdb-discov...
https://www.youtube.com/watch?v=62Nabpb94Jw&list=PL3rNcyAiDYK2_87aRvXEmAyD8M9DARVGK  

https://www.servicenow.com/community/itom-forum/servicenow-itom-interview-questions-for-1-5-2-years-...

https://servicenowspectaculars.com/servicenow-cmdb-scenarios-based-questions-2025/

https://www.servicenow.com/community/developer-articles/servicenow-discovery-amp-cmdb-interview-ques....

https://servicenowspectaculars.com/servicenow-it-operations-management-scenario-based-questions-2025...

https://www.servicenow.com/community/itom-forum/how-to-prepare-for-itom-developer-interviews/m-p/349...

https://www.youtube.com/watch?v=4mVidT_-ppo

[Tanushree Maiti]

Hi @VamshiPeddapall 

Regarding Discovery -

• First complete Discovery Fundamentals On Demand 
• Windows discovery 
• Troubleshooting Discovery
• ServiceNow Discovery: How Windows CI Discovery Works Using Probes & Sensors
• https://www.servicenow.com/community/itom-forum/itom-discovery-best-practices-for-windows-servers-9-...
• KB0696857 vCenter discovery shows warning: Active, couldn't classify: No WMI connec..... 
• https://www.servicenow.com/community/itom-forum/about-discovery-windows-servers-from-mid-server-thro...
• https://www.youtube.com/watch?v=fvZ_psJocxs&t=49

•    Linux discovery 
• https://www.servicenow.com/community/itom-forum/itom-discovery-best-practices-for-linux-servers-9tip...
• https://www.youtube.com/watch?v=5C7h36Drw-c
•  https://www.servicenow.com/community/itom-forum/linux-discovery/m-p/915831
• https://www.servicenow.com/community/service-management-forum/linux-discovery-question/m-p/384909

[Tanushree Maiti]

Hi @VamshiPeddapall 

Regarding Integration Scenarios:

ITOM ecosystem generally categorizes these integrations into three main types:

• Discovery Integrations: Automatically scan and map your entire infrastructure, utilizing tools like the Agent Client Collector (ACC-V) and Service Graph Connectors.
• Event & Alert Ingestion: Ingest and correlate data from external monitoring tools (e.g.,  SolarWinds, AWS CloudWatch) into the em_event table to prevent outages. Push and pull events using API integrations. For instance, you can use built-in listeners for cloud platforms or utilize REST APIs and webhooks to inject customized events into ServiceNow.
• Orchestration: Use tools like IntegrationHub to run custom scripts, PowerShell, or SSH tasks to auto-remediate issues.

Refer for more details:

https://www.servicenow.com/community/itom-forum/types-of-integration-in-itom-process/m-p/2978636

A List of ITOM Health Integrations

Integrating with IT Operations Management 

https://www.servicenow.com/community/cmdb-forum/integrations-cmdb-itom/m-p/2592689

[Tanushree Maiti]

Hi @VamshiPeddapall 

Regarding ECC Queue Troubleshooting

• KB2481465 Discovery Jobs Not Completing, No ECC Queue Messages 
• KB1002554 Find ECC Queue records and MID Server logs for a failing Orchestration Workflow activity 
• KB0727132 How to link an ECC Queue record back to a specific Feature or Job 
• https://www.servicenow.com/community/developer-forum/ecc-queue-error-in-input-message/m-p/2013279
• https://www.servicenow.com/community/developer-forum/ecc-stuck-during-discovery/m-p/3401701
• https://www.servicenow.com/community/developer-forum/quot-ecc-queue-retry-quot-plugin-can-be-used-fo...

[Tanushree Maiti]

Hi @VamshiPeddapall 

Regarding  Best Practices from Real Implementations:

• https://www.servicenow.com/community/cmdb-forum/servicenow-discovery-decoded-the-itom-guide-for-it-p...
• https://www.reco.ai/hub/servicenow-itom
• Pattern Development Best Practices for ServiceNow Discovery and Service Mapping
• https://www.servicenow.com/community/cmdb-forum/best-practices-for-discovery-scheduling/m-p/3325689

• https://www.servicenow.com/community/itom-blog/best-practices-for-setting-up-discovery-schedules/ba-...

• https://www.servicenow.com/community/itom-forum/best-practice-guide-for-service-discovery-schedule-r...

• https://youtu.be/AcXKl6hMtRA?si=mbCvQer3U_RnJNAw