PL-900 Practice Question: Demonstrate the capabilities of Power Automate
A Power Automate flow fails with the error 'GatewayTimeout'. The flow uses an on-premises data gateway to connect to a SQL Server database. What is the most likely cause?
⚠ Common exam trap
The trap is assuming any flow failure relates to credentials or licensing — candidates must recognize that GatewayTimeout specifically points to connectivity between the cloud and the on-premises gateway, not authentication or configuration.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The on-premises data gateway is offline or unreachable.
A GatewayTimeout error in Power Automate when using an on-premises data gateway indicates that the cloud service could not reach the gateway within the allowed time. The most common cause is that the gateway is offline, stopped, or otherwise unreachable from the internet. This directly produces the timeout rather than an authentication or configuration error.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The SQL Server credentials are incorrect.
Why it's wrong here
Invalid SQL credentials produce an authentication or login failure, not a GatewayTimeout, which indicates the gateway did not respond within the allowed interval. It tempts because credential errors are a frequent gateway-related fault, but they surface as distinct authentication errors instead.
- ✗
The flow creator does not have a Power Automate license.
Why it's wrong here
Licensing governs whether the flow can run at all, producing authorisation or suspension errors, not a GatewayTimeout. The gateway timeout arises from the gateway's inability to reach SQL Server within the timeout window. Licensing would be the correct focus if the flow failed to start or the maker lacked a Power Automate plan.
- ✓
The on-premises data gateway is offline or unreachable.
Why this is correct
GatewayTimeout indicates the cloud flow waited for the on-premises data gateway but received no response. An offline or unreachable gateway cannot broker the SQL Server connection, so the request expires. Restoring gateway connectivity resolves the timeout.
- ✗
The flow trigger is misconfigured.
Why it's wrong here
A misconfigured trigger would prevent the flow from starting or fire it at the wrong time; it cannot produce a GatewayTimeout, which occurs after the trigger fires while the gateway waits on SQL Server. Trigger configuration is the correct focus when the flow never runs or runs on the wrong event.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Microsoft exam blueprint
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