Problem

You are experiencing intermittent errors with the MS Outlook connector. One example is this error:

AADSTS7000215: Invalid client secret provided. Ensure the secret being sent in the request is the client secret value, not the client secret ID, for a secret added to app '…. '

Resolution

Authorize and Token URLs

When configuring the MS Outlook connector, the Authorize URL and Token URL have these default values:

https:// login.microsoftonline.com/common/oauth2/v2.0/authorize
https:// login.microsoftonline.com/common/oauth2/v2.0/token

However, 'common' must be replaced with your own Tenant Id from Azure:

https:// login.microsoftonline.com/<your-tenant-id>/oauth2/v2.0/authorize
https:// login.microsoftonline.com/<your-tenant-id>/oauth2/v2.0/token

The tenant ID is shown in the Application screen in Azure:

Client secret expiration

OAuth client-secrets in Azure expire after some time, anywhere from 90 days to 24 months. When the secret expires, a new one must be created and provided in the Fusion configuration.