1. Go to Settings > Accounts > Your info
2. Click "Sign in with a local account instead" if your Microsoft
account is added. You might be signed out after this step.
3. Sign back in. Then go to Settings > Accounts > Access work or school
4. Click "Disconnect" on your ISM account.
The next time you will try to login to any MS product , uncheck the box to "Allow my organization to manage my device", and then click "No, sign in to this app only".