We are currently unable to utilize Universal Print in our environment due to having the multiple AAD accounts logged in to our machines. An issue that cannot be resolved in a quick manor. Due to the...
For the first part, please upvote the Multiple work/school account - Microsoft Tech Community feature request.
For the second part, please consider printing from OneDrive web as a workaround. You can sign in to OneDrive using any AAD account, upload a document, and print it. More information at Announcing Universal Print integration with OneDrive - Microsoft Tech Community