An administrative authentication failure might come from:
- Bad credentials.
- No license providing SharePoint access to the administrator.
- We use SharePoint administrator API in order to perform autoprovisioning and provide rights to the administrator to access user sites. Some Office 365 plans prevent us from accessing them (small business, for example).
Depending on the problem, you can resolve your issue by:
- Correcting the credentials.
- Grant a license allowing the administrator account access to SharePoint.
If your plan doesn't provide access to the SharePoint administrator API, you must use user credentials.