Hey there Mike! I am the SME for SSO for the Marketing Cloud. The moderator alerted me to your question. Typically the process for Adobe approval is roughly 10 business days to check both Creative Cloud and Digital Marketing to see if anyone has claimed it and get both parties talking together is roughly how long that can take. In this case it sounds like it sounds like its stuck. If I can have you file a case to firstname.lastname@example.org and provide us with the domain that was claimed and what Marketing Cloud it was claimed on make as SSO for Marketing Cloud - Domain Claimed: < name of domain > waiting more than 10 days? We can have a look at that on our side and see what is happening see if we can get that resolved for you quickly. Really sorry for the delay you have had with this!