
Hi @Yan Savoie,
Thank you for posting in Microsoft Q&A Forum.
Regarding to your question, yes. You can have both Microsoft 365 Business Standard and Business Premium licenses within the same tenant. You can visit the Marketplace in your Microsoft 365 Admin Center and choose the licenses that best suit your organization’s needs.
Additional tip: you can use the compare feature to choose which options that suitable for your need.
Thank you for sharing your concern. If you have any further questions, please don't hesitate to let me know.
I hope you have a great experience while optimizing your costs!
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