Login to your Azure Portal.
Navigate to Azure Active Directory and click App Registrations.
Select the app registration used for Gimmal Cloud connectivity (possibly named M365 Access via Graph).
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You may need to select All applications.
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If one has not been created, please follow Configuring Graph API.
Upload Certificate
Click Certificates & secrets in the left navigation.
Click Upload certificate.
In the right drawer, click Select a file.
Select the .crt file that was created in Generate Self-Signed Certificate.
Click Add.
Verify the Thumbprint, Start date, and Expires.
Configure Permissions
Click API permissions in the left navigation.
Click Add a permission.
In the right drawer, click SharePoint.
Click Application permissions.
Select Sites.FullControl.All, then click Add permissions.
Click Grant admin consent for {Your Tenant}.
Click Yes.