Why is Outlook desktop app not syncing calendar with Microsoft 365?

Robert Miller 0 Reputation points
2025-09-08T10:24:59.45+00:00

I’m building an Azure Function (v4) that needs to connect to an Azure SQL Database in the same region with a configured Private Endpoint.

What I’ve tried so far:

• Created a Private Endpoint for the SQL Server with proper subnet and DNS settings

• The Function App is in a different subnet but same VNet (VNet integration enabled)

• The Function can resolve the SQL server name, but connection fails with error: “Login failed: 28000”

• Checked NSG rules, no outbound blocks found

Has anyone run into this issue? What else should I check or configure? Any guidance would be really appreciated

Windows Insider program | Office on Insider preview
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