No provisioning provider installed

This error is a known configuration issue with Exchange.

This error is misleading in that it is typically caused by a lack of permissions by the adapter logon account. Typically the error is not because a "provisioning provider" is installed.

To provision mailboxes to Exchange, the logon account must be a member of the appropriate security groups. Because of these variations, it is not possible to provide a definitive list of group memberships that are required by the adapter logon account:
  • Active Directory installations can be on single domains, multiple domains, or sub domains.
  • Groups can be customized, that is added to other groups.
Membership in the Domain Admins group is required to provision accounts.

Typically, membership in the following Exchange groups is sufficient for the adapter to provision mailboxes:

  • Recipient Management
  • Organization Management
  • Exchange Windows Permissions

If the adapter logon account is a member of these groups and the error persists, add a membership to Enterprise Admins group. This action can determine if the problem is due to permissions. If adding this membership resolves the issue, see the Microsoft documentation about trial and error to determine which group memberships are needed.