how to find how many email addresses on my account

To check how many email addresses are associated with Microsoft accounts used on devices and apps, look in the places where account usernames are shown:

1. On a Windows 10/11 device where the account is already signed in, go to Start > Settings > Accounts. Under Email & app accounts, the usernames associated with the device are listed.
2. In Office apps such as Word or Excel, go to File > Account. Under Product Information, check Belongs to to see the associated username.
3. Check email inboxes for Microsoft purchase receipts or subscription messages, which can help identify other Microsoft account email addresses.
4. If an alternate email address may have been set up for the account, try that address as well.

If the goal is to find whether the same email address is being used for both a personal account and a work or school account, a sign-in prompt that says “Which account do you want to use?” indicates that both account types exist with the same email address.

• Check products or services where you used your Microsoft account
• Which account do you want to use?