On attempt to purchase Office365 subscription using the
Use an existing Microsoft account option in CCP or Online Store the following error appears:
Error occurred: please check your input correctness and try again
Also in browser console:
POST https://cp.provider.com/aps/2/resources/0a365b26-b4b2-414b-92a6-b1bc77bfdd0d/getDomainOwnershipDetails 403 (Forbidden)
Software-related issue #APSA-16762: "Cannot create in Online Store new OA account, using an existing Microsoft account".
Contact Odin Technical Support Team
As a w\a please apply the KB128673