Showing results for 
Search instead for 
Did you mean: 
Level: Power Up

unauthorized when sending to service bus

Get the following when trying to send a simple message to a service bus queue

40103: Invalid authorization token signature, Resource:sb://<namespace> TrackingId:<removed>, SystemTracker:<removed><removed>, Timestamp:2/12/2018 8:43:02 PM clientRequestId: <removed>


This has been working fine, but stopped a couple weeks ago. I do go to the azure portal and grab the shared access policy connection string for the root namespace, i.e. not for a specific queue.

Community Support Team
Community Support Team

Re: unauthorized when sending to service bus

Hi @jatwork,


Could you please share a screenshot of your flow's configuration?

Do you use the "Send message" action of Service Bus connector within your flow?


The user MarkStokes has faced similar issue with you and the Microsoft Employee 






Community Support Team _ Kris Dai
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Level: Power Up

Re: unauthorized when sending to service bus

When I retested I am geting the same error. 

I was already following the other discussion and am taking the root namespace connection string for the service bus.

Can you try it on your side and see if you get an error. 

Here is a screen shot: Servicebusflow



Button-> Compose with {"name":"myname"} ->send to Service Bus



Helpful resources


Watch Sessions On Demand!

Continue your learning in our online communities.

Power Platform 2019 Release Wave 2 Plan

Power Platform 2019 Release Wave 2 Plan

Features releasing from October 2019 through March 2020


Flow Community User Group Member Badge

Fill out a quick form to claim your user group badge now!


New Flow Community Board!

Check out the new Microsoft Flow Community Blog Topic Suggestion board!


Australia Summit

Travel to Melbourne and network with thousands of peers!


Microsoft Learn

Learn how to build the business apps that you need


Power Platform World Tour

Find out where you can attend!


Webinars & Video Gallery

Watch & learn from the Flow Community Video Gallery!

Top Kudoed Authors
Users Online
Currently online: 43 members 3,933 guests
Please welcome our newest community members: