How to update Expired VSTS Service Principal Keys in AzureRM portal

If the service principal expires you may need to update the expiration by creating a new key. 

In Visual Studio Team Services, the following error may be logged if the Service Principal key is expired:

 

Failed to check the resource group status. Error: Could not fetch access token for azure. Status code: 401, status message: Unauthorized.

To fix, we can create a new key:

 

Login to the Azure portal:

https://portal.azure.com

Select Azure Active Directory

 

Select App Registrations from the sidebar

 

Search for the Service Principal Client ID – that has expired

 .

Select the Application after searching.

Select “Keys”

 

Create a new password you can enter anything as the description – set the duration to never expire.

 

Click save and copy the value shown under “value”.

In VSTS select Services under project

Select "Update Service Configuration" and enter the new key.