Thank you for posting this in Microsoft Q&A.
I understand that you are trying to publish the application but when adding MPN id you got an error message " The Partner One ID you provided (MPNID
) doesn't exist, or you don't have access to it. Provide a valid Partner One ID and try again".
Most commonly caused by the signed-in user not being a member of the proper role for the CPP account in Partner Center- see requirements for a list of eligible roles and also be caused by the tenant the app is registered in not being added to the CPP account, or an invalid Partner One ID.
Please cross-check the steps you followed with this document: MPNAccountNotFoundOrNoAccess
Hope this helps. Do let us know if you any further queries.
Thanks,
Navya
If this answers your query, do click Accept Answer
and Yes
for was this answer helpful. And, if you have any further query do let us know.