Disable and Enable External Sharing through Powershell

Hello All,

We are using On drive For Business in our organization.Due to security reasons we would like to disable the external Sharing option. But we don't want to do that at Tenant level. We want to disable External Sharing option at individual user level. I found this script that disables external Sharering

set-spositehttps://mytenant-my.sharepoint.com/personal/mypersoanalsite_com -SharingCapability disable 

I need a same kind of script to enalble the disabled sites. Could you please help me with the script

Thanks in Advance

Ujwala