how i can know that on how many devices my microsoft account is logged in and how i can log out from devices using my main device

1

You can find the devices linked to your Microsoft account on this link, however that may not provide a full list of all devices you have logged into with your Microsoft account.

https://account.microsoft.com/devices

2

You can force a log out on all devices you are logged into with your Microsoft account by going to this link:

https://go.microsoft.com/fwlink/?linkid=2253707

Scroll down to the 'Sign out everywhere' and select 'Sign out'.

This process will log you out of all devices you have logged into with your Microsoft account and may take up to 48 hours to complete.