Dynamics Community Forum Thread Details

Urgent: Business Central Sandbox Upgrade & Extension Deployment Issues

Hi,

I'm having trouble getting my Business Central sandbox to the version I need for testing my extension, and I’m running out of time before production forces an upgrade.

Current Situation:

Development Instance: 25.2.27733.29622
Sandbox (Target for Testing): 24.5.23489.29195 (with an old version of my extension)
Next Scheduled Upgrade: 25.0.23364.24599
Production Upgrade Deadline: 28th (at which point my extension will be disabled)

Issues Encountered:

I added my extension for the Next Major Upgrade and tried to force the upgrade, but it didn’t go through.
The upgrade window keeps getting pushed a week ahead, and this has now happened twice.
I need my sandbox at the correct version to test before production updates.
If my sandbox updates to 25.0, I assume my extension (built on 25.2) will still have symbol compatibility issues.

Questions:

Is there a way to manually upgrade my sandbox to the version I need?
Are there logs I can check to understand why the upgrade isn’t happening?
If my sandbox does reach 25.0, would I still need another upgrade to 25.2 for my extension to work?

I’m new to this and feeling completely lost—any guidance would be greatly appreciated!

BC Issue.txt

Categories:

Dynamics 365 Business Central

You're facing a version mismatch issue that’s preventing you from testing your extension before production updates. Here’s how to handle it effectively:

1. Manually Upgrading the Sandbox

Unfortunately, you cannot manually upgrade a Business Central SaaS sandbox to a specific version. Microsoft controls the upgrade waves, and tenants are upgraded based on a predefined schedule. However, you have a few options:

Option 1: Create a New Sandbox
- Go to Admin Center → Environments → Create New Sandbox
- Select the highest available version (it may not be 25.2 yet but should be closer than 24.5).
- Install your extension and test there.
Option 2: Request an Upgrade via Microsoft Support
- In Admin Center, navigate to Help & Support.
- Open a support ticket requesting an immediate upgrade.
- Provide details on why you need the upgrade urgently (i.e., production extension dependency)

2. Checking Logs for Upgrade Issues

To understand why your sandbox isn’t upgrading, check:

Admin Center → Operations → History
- Look for failed upgrade attempts and error messages.
Event Viewer Logs (via Business Central Admin Center)
- Logs may indicate whether the upgrade was postponed due to conflicts.

3. Compatibility of Extension (25.2 on 25.0 Sandbox)

If your extension was built on 25.2, it may not be compatible with 25.0 unless you explicitly allowed backward compatibility (runtime in app.json).
If the sandbox updates to 25.0, you may need to:
- Recompile the extension for 25.0.
- Deploy this compatible version for testing.
- Wait for Microsoft to upgrade to 25.2 before full testing.

Recommended Next Steps

Try creating a new sandbox with the latest available version.
Check upgrade logs to see why the upgrade is delayed.
Contact Microsoft Support via Admin Center → Help & Support and request an immediate upgrade.
Prepare a backup strategy by creating a 25.0-compatible version of your extension to avoid production downtime.

Quick Links

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