Skip to main content
cancel
Showing results for 
Search instead for 
Did you mean: 

The Power BI Data Visualization World Championships is back! Get ahead of the game and start preparing now! Learn more

Reply
Anonymous
Not applicable

Underlying connection was closed - Dynamics Nav Data Source error

I am trying to connect Dynamics NAV 2017 to Power BI Desktop as an Online Services data source, however, I keep receiving the error below.

 

Unable to Connect

We encountered an error while trying to connect.

Details: "Dynamics NAV: Request failed: The underlying connection was closed: The connection was closed unexpectedly."

 

Unable to Connect Error.png

 

Please advise. 

1 REPLY 1
v-yanjiang-msft
Community Support
Community Support

Hi @Anonymous ,

One thing to start doing is capturing web traffic traces using Fiddler, that should give us some insight of what may be happening. 

 

Best Regards,
Community Support Team _ kalyj

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

Helpful resources

Announcements
Power BI DataViz World Championships

Power BI Dataviz World Championships

The Power BI Data Visualization World Championships is back! Get ahead of the game and start preparing now!

December 2025 Power BI Update Carousel

Power BI Monthly Update - December 2025

Check out the December 2025 Power BI Holiday Recap!

FabCon Atlanta 2026 carousel

FabCon Atlanta 2026

Join us at FabCon Atlanta, March 16-20, for the ultimate Fabric, Power BI, AI and SQL community-led event. Save $200 with code FABCOMM.