During upgrade of Hosted Exchange organization from Exchange 2003 to Exchange 2007, you get the error message:
Upgrade to next Exchange version failed. Could not upgrade organization '<organization ID>' to next Exchange version. Could not find 'Exchange2007Autodiscover' server with enough capacity to add the additional services. Please contact your vendor to resolve the issue.
In Exchange 2007 new services were introduced which did not exist in Exchange 2003, including Exchange autodiscover. Branding for these services is not configured properly in POA.
Login to POA Control Panel of the corresponding customer's vendor - Provider or reseller. Locate the customer account the problem subscription belongs to under Operations Director > Customer Manager. On the 'Summary' tab under 'Branding' information you can find the name of the brand customer account is created under: