If you are having issues with your account being locked having a mobile phone with an old password could be the reason that you are being locked out. In this case you should update your password on your phone. If you have lost the phone and wish to remove the access to your email this tutorial will show you how to do that using webmail.
The first step is to navigate to WebMail from your browser of choice. Next in the top right hand corner of the screen you should see options. Click on options and select see all options.
Next you should navigate to the phone settings on the left-hand side.
Here you should see all the connected devices that you have synced to your email. You want to select the device that you wish to remove and click on the “x” remove button.
Next you will be prompted if you are sure you’d like to remove this. Click yes.
Then you are all set, you have successfully removed the device and should no longer see it in your list of phones.