This only works if you have an 0365 work or school email account
Sign in to the Office 365 portal (https://portal.office.com).
Click Mail. Click Settings ( ), and then click Options.
In the left navigation pane, click Phone.
Select the device that you want to wipe.
Click Wipe Device ( ), and then click Yes when you're prompted.
When the wipe operation is completed, you should remove the device completely.
To do this, click Delete, and then click Yes when you're prompted.