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Dear @Mark White,
Thank you for reaching out to Microsoft Q&A forum.
I understand you’re having trouble installing Visio Professional 2021. From what you’ve described, the most likely cause is that your Visio license is digitally linked to your Microsoft account (from purchase or redemption), rather than a standalone key you must enter manually. Because Microsoft 365 is already installed, your device may also be looking for a subscription license, which can confuse activation for a one‑time purchase like Visio 2021.
In most cases, if you bought Visio 2021 through the Microsoft Store or associated it with your account during the initial setup, you don't need the key to install it.
- Go to account.microsoft.com/services and sign in with the same email you used for your Microsoft 365 subscription.
- Scroll down to the Products you've purchased section.
- Find Visio Professional 2021 and click Install.
Tip: If you need a specific version (like 64-bit to match your Office 365), click "Other options" before hitting install.
If the installer specifically demands a key and won't let you sign in to activate, you can find the original 25-character code in your Microsoft account history:
- Go to microsoft store and sign in.
- Click on your name/profile icon in the top-right and select Order History.
- Locate your Visio Professional 2021 purchase.
- Click Install/Details. A pop-up window will appear showing your Product Key.
Note: This key is often different from the "Redemption Code" you might have received in a confirmation email.
For reference: Install Visio or access Visio for the web - Microsoft Support
If your Microsoft 365 apps are signed in with a Work/School account but Visio is a Personal purchase:
- Check the Account: Open Word, go to File > Account, and look at the email under "User Information." If this isn't the same email you used to buy Visio, the "Sign In" activation won't work.
- The "I don't want to sign in" Link: If Visio asks for a key upon opening, look for a small link at the bottom of the prompt that says "I don't want to sign in or create an account." Clicking this often reveals the manual 25-character entry box where you can paste the key found in your Order History.
I hope this information is helpful. Please follow these steps and let me know if it works for you. If not, we can work together to resolve this. Thank you for your patience and understanding. If you have any questions or need further assistance, please feel free to share them in the comments so I can continue to support you. I'm looking forward to your reply.
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