You can and should perform this simple security audit on a regular basis: Check all devices currently signed in to your Microsoft account. If you've switched between a lot of computers since you first signed up for an account, it's probably active in more places than you think.
Not only will this alert you to unwanted visitors who may have accessed your account through malicious means, it will also flag old devices that you no longer use but are still logged into - whether it's your Xbox for sale on eBay or one you gave to your nephew laptop.
Whatever the case, to keep your Microsoft account locked and as well protected as possible, you should only connect it to devices that you use regularly. If there are devices in the list that you don't recognize or no longer use, you can remotely delete them with just a few clicks.
It's worth doing this for all your other digital accounts, see for example these Lifehacker posts which have information on how to do this for your Apple, Google and Netflix accounts.
How to see all the devices using your Microsoft account
To see all the devices using your Microsoft account, you'll need to do this on the web through your Microsoft account page (you can't currently do this from within Windows). The login page displays all the information related to your Microsoft profile, including your name and your region, as well as any subscriptions you are currently signed up for (such as Microsoft 365).
To see all the places your Microsoft account is active, click Devices . The main hardware you'll see in the list are Windows computers and tablets, as well as any Xbox console you're signed into. Further down the page, you'll see a link to check which Android and iOS devices your Microsoft account is connected to.
Select any device in the list to see more information about it. What's provided may vary, but may include device specifications, when you signed up for a Microsoft account, and any applicable warranty details. For some devices, you can find their location on the map by clicking Find My Device .
Remove unauthorized devices from your Microsoft account
You can use the information provided to help spot suspicious activity, for example, you should be able to see when the device was last accessed. Click Remove this device to disconnect the device from your Microsoft account, but use caution: You can always sign back in if you disconnect hardware you still need.
While you're here, it's worth opening the Security tab and checking how you're logged into your Microsoft account. Click the Manage how I sign in link to set up extra precautions, such as two-step verification or passwordless account access, to make it harder for anyone but you to sign in to your Microsoft account.
