Powerpoint will let me use a school account even though it is logged in.

Hi Sophia,

I can understand how frustrating this must be, especially when your school account is already signed in but PowerPoint still refuses to recognize it.

I looked into the error you shared (Tag: 7ita9, Code: 3399811147), and it has been reported by other students using Microsoft 365. In many cases, Windows recognizes the school account, but PowerPoint has trouble authenticating it because of outdated or conflicting sign-in credentials.

Here's what I'd suggest trying:

1. First, sign in at https://www.microsoft365.com using your school account. If it works there, your account itself is likely fine.
2. Close PowerPoint and other Office applications. Go to Settings → Accounts → Access work or school, select your school account, and disconnect it. Restart your computer, reconnect the account, and try PowerPoint again. If it's a school-managed computer, check with your IT department before disconnecting.
3. If that doesn't help, open Credential Manager → Windows Credentials and remove any outdated entries specifically associated with your school account or Microsoft Office. Restart and sign in again.

One other thing worth checking is whether your school provides a Microsoft 365 license that includes desktop applications, rather than just the web versions.

If the error continues, your school's IT team can investigate using the correlation ID and timestamp you provided.

Just one question: Does PowerPoint work when you sign in through your browser, or do you get the same error there too? That would help narrow down the problem.

Hope this helps you get back to your work!