Microsoft project management software used to plan, manage, and communicate a project schedule and other information among workgroup members, project managers, and other stakeholders.
The next step is to verify that Project Professional 2024 became an entitlement on the exact Microsoft account used during redemption; if it is absent, reinstalling or deleting Project 2019 will not correct the key-to-account association.
1. Check the redeemed entitlement
- Open the Microsoft account Services & subscriptions page:
https://account.microsoft.com/services - Sign in with the same personal Microsoft account used when the 2024 key appeared to redeem successfully.
- Look specifically for Project Professional 2024 under Products you’ve purchased.
- If you use more than one Microsoft account, sign out and check each plausible account. A redeemed retail key is linked to the account used during redemption and is subsequently installed using that account, not by entering the key again.^1^
There is no need to hide or delete Project 2019. When both products are listed, select Install specifically beside Project Professional 2024, then use Other options to choose 64-bit. Microsoft’s Project instructions explicitly require locating the desired Project version in the owned-products list before selecting its installer.^2^
Since the Office Removal Tool, Credential Manager cleanup, reinstallations, and private browsing have already been tried, repeating those actions will not address a missing online entitlement.
2. If Project Professional 2024 is not listed
Determine which licensing channel the retailer sold:
- Retail one-time purchase: The key should be redeemed at
https://microsoft365.com/setup, after signing in with a personal Microsoft account. Successful redemption links Project to that account once.^2^ - Microsoft Workplace Discount Program: Project Professional purchased through an employer uses a different process. Start Project, select I don’t want to sign in or create an account in the setup window, and enter the key there. This type may not follow the normal retail account-association flow.^3^
- Volume-license edition: This is not installed from a personal Microsoft account. The organization must deploy Project Professional 2024 using the Office Deployment Tool and its volume-licensing configuration.^4^
Ask the retailer to state in writing whether the supplied key is Retail, Workplace Discount Program, or Volume License. The wording “Project Professional” alone does not identify the channel.
If the retailer confirms it is a normal retail key but Project 2024 remains absent:
- Try redeeming it once more at
https://microsoft365.com/setupwhile signed into the intended account. - If it reports This product key has already been used, the key has already been attached to an account; check other accounts or contact Microsoft Support to identify the account-association problem.^5^
- If it reports that the key is invalid, blocked, or not intended for the region, return to the retailer. Microsoft advises requesting a refund when a separately sold key is blocked, unauthorized, or stops working.^6^
- If redemption completes without an error but the entitlement still does not appear, contact Microsoft Support with the purchase receipt, retailer name, redemption date, exact product description, and screenshots of the redemption result and Services & subscriptions page. Do not post the product key publicly.
3. After the entitlement appears
- Return to
https://account.microsoft.com/services. - Find Project Professional 2024, not the 2019 entry.
- Select Install → Other options → 64-bit → Install.
- Run the newly downloaded installer.
- Open Project and check File → Account to confirm that the displayed product is Project Professional 2024.
If other Office, Project, or Visio products remain installed, they must use the same 32/64-bit architecture. Compatibility can also depend on installation technology and update channel.^7^
References
- "This product key has already been used" error in Office | Microsoft Support
- Install Project | Microsoft Support
- Where to enter your Office product key | Microsoft Support
- Deployment guide for Project
- Get help with product key errors on Office.com/setup | Microsoft Support
- "Product key is not valid" error when activating Office | Microsoft Support
- Supported scenarios for installing different versions of Office, Project, and Visio on the same computer