Hi @Le Tuan
I have 10 licenses for Office Standard LTSC 2021 purchased via CSP
Is this Office a volume licensed version of Office? Besides, did you buy a MAK key to activate this Office?
Each MAK has a predetermined number of allowed activations and is based on your volume licensing agreement.
But actually, the number of activations available for a product won't always match the number of licenses purchased, you'll receive more activations in case you need to reinstall and activate some of your products, or your device changes the hardware significantly, because these actions will increase MAK count.
I am not able to tell you the maximum number of your MAK activations that Microsoft gives you. You need to sign into Microsoft 365 admin center to check your volume licensing agreement and activation numbers, for more please refer to: https://video2.skills-academy.com/en-us/licensing/.
If your device changes the hardware significantly, the MAK count is not enough, please request an increase to MAK activation limits from Microsoft: https://video2.skills-academy.com/en-us/microsoft-365/commerce/licenses/product-keys-faq?view=o365-worldwide#how-to-request-an-increase-to-mak-activation-limits.
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