If your customers with Microsoft 365 Business Premium + Copilot bundles couldn't buy Advanced Security add-ons, the issue is fixed.

The Problem (Now Solved)


Until February 19, 2026, Partner Center had a validation error: The system wasn't recognizing Microsoft 365 Business Premium + Copilot bundles as meeting the prerequisites for Advanced Security add-on SKUs.

Result: Partners trying to sell Advanced Security to eligible customers got blocked in Partner Center.
Status: Fixed as of February 19, 2026. Validation logic corrected.

What's Fixed


Partners can now transact (sell) Advanced Security add-ons for customers with Business Premium + Copilot bundles without errors.
Impacted Advanced Security SKUs (now available for bundled customers):

- Microsoft Defender Suite for Business Premium
- Microsoft Purview Suite for Business Premium
- Microsoft Defender and Purview Suites for Business Premium

Action Required

None. The fix is automatic. No changes needed on your end.

Your customers with Business Premium + Copilot bundles should now be able to add Advanced Security add-ons through Partner Center without encountering validation errors.

If You're Still Seeing the Issue

Deadline: February 21, 2026

If customers continue to experience issues after February 19, contact Partner Center Support through your standard escalation channels immediately. This gives Microsoft time to investigate and resolve edge cases.

Why This Matters


Business Premium + Copilot is a key bundle for SMB customers. Advanced Security add-ons (Defender Suite and Purview Suite) are the logical next step for securing those customers' data and endpoints.

This fix removes a friction point that was preventing partners from upselling security to their most cloud-forward SMB customers.

Next Steps


- Test it: Try adding an Advanced Security add-on to a Business Premium + Copilot customer in sandbox or production
- Confirm it works: If no errors, you're good to go
- Sell it: Reach out to customers who have Business Premium + Copilot and discuss security add-on options

Sources & References


This article is based on official Microsoft Partner Center announcements:

- Microsoft Partner Center February 2026 Announcements — Issue update: Business Premium + Copilot Bundle prerequisite validation error
- Full February 2026 Announcements Page

TL;DR


- Issue: Microsoft 365 Business Premium + Copilot bundles weren't recognized as eligible for Advanced Security add-ons
- Status: Fixed effective February 19, 2026
- What works now: Partners can sell Defender Suite, Purview Suite, and combined suites to Business Premium + Copilot customers
- Action: None required — automatic fix
- Still stuck? Contact Partner Center Support by February 21