Applies to:

Call2Teams - Customers


Customers encounter an issue with a missing API in their Azure Tenant. 


The missing API in the customer's Azure Tenant can lead to a problem provisioning the service, where the customer sees an  Invalid_Client error on first sync.


Follow these steps to fix the Microsoft tenant so the service can be deployed:

1. Install the Azure PowerShell module

Follow the instructions below. 

These steps are also available at

2. On a Windows PC, Run PowerShell as administrator

3. PowerShell will now launch in Administrator mode:

4. Run the following command: 

Install-Module -Name Az -AllowClobber  

5. PowerShell will take a few moments to install some dependant modules. A

6. Approve the installation requests as shown below:

7. Run the following two commands to login, and install the API endpoints to the tenant:


New-AzADServicePrincipal -ApplicationId "39624784-6cbe-4a60-afbe-9f46d10fdb27"

If an error appears then users may need to first run the following command:

set-executionpolicy remotesigned


The following should be returned from PowerShell, and then the issue should be resolved: