Dynamics Community Forum Thread Details

D365FO On-prem 10.0.42 Sandbox – Update Failed in LCS, How to Identify Root Cause and Prevent It?

Hi everyone,

I recently tried to update a D365 Finance & Operations on-premises Sandbox environment (version 10.0.42) via LCS, but the update ended up in a Failed state.

After checking the logs:

merge.log and install-AXPackages.log show that the package deployment itself completed successfully
No compile errors, sync errors, or exceptions were found
However, LCS still marked the environment as Failed

I’d like to ask for some guidance:

What are the recommended ways to identify the real root cause when an on-prem update fails but logs show no obvious errors?
- Which logs or phases should be checked beyond merge.log and install-AXPackages.log?
- Could this be related to post-deployment health checks or service validation in LCS

Is it possible that the failure is related to the environment being on an out-of-service version (10.0.42)?
- Has anyone experienced LCS marking an update as failed due to version support or validation issues, even when deployment succeeds?

What best practices would you recommend to prevent update failures like this in the future for on-prem environments?
- Version alignment
- Pre-update checks
- Maintenance steps before starting an updat