Hello Pete,
Thank you for using our Microsoft Advertising Learn Q&A Platform!
It seems that you're struggling to link your Shopify store with your Microsoft Advertising account. I hope the response and resources provided here can point you in the right direction. For a more thorough troubleshooting, I'd like to encourage you to reach out privately. I will be more than happy to share your details with our experts for providing you with potential solutions.
The error message you're receiving typically occurs when the Microsoft Advertising Manager Account you are trying to connect does not match the account previously linked to your Shopify store. Only one Manager Account can be connected to a Shopify store at a time. If you attempt to connect a different one, you will receive a “Binding Error” message. We may be able to help in getting unlinked from your Shopify store. Once done, you can connect a new Microsoft Advertising Manager Account. After disconnecting, Shopify will auto-pause your campaigns, and you will need to manually reactivate them once the new connection is established.
For further details, please see the help sources listed below:
Microsoft Advertising on Shopify: The Microsoft Channel app
Our support teams are happy to discuss your account in more detail via phone, chat or email to provide review assistance, please see our support page to reach out!
I hope the information provided here will at least partly answer your question. If you have any additional questions please do not hesitate to reach out to our support. I have also sent you a private message asking for further details. You are more than welcome to respond to me so that I can begin the investigation on my end.
Kind regards,
Vahid | Microsoft Advertising Support Specialist | 800-518-5689