How to check if an email is hosted with an Office 365 account

Once a domain is added and verified into Office 365 there is a default domain appended to every tenant. You can view your tenant setup by going to Setup and Domains within the admin portal. Typically, when you do the registration most admins will configure the tenant with the company name. For example, in domains, you may see “

Using, search for your domains first, then we will search for the default domain but adding the company name in front.

This will show us that mail are all using Office 365 mail servers on Microsoft.

OneDrive for Business stops syncing libraries, or the icon overlays don’t appear on synchronized files and folders after you install Office 2016


Consider the following scenario.

  • You upgraded to Office 2016 on your computer.
  • When you use OneDrive for Business, your libraries stop syncing and the icon overlays don’t appear on synchronized files and folders.

To resolve this issue, perform these steps:

  1. Manually start the OneDrive for Business Desktop app by using the Start menu.
  2. Restart the computer.Note After you restart your computer, you shouldn’t have to manually start OneDrive for Business again. The OneDrive for Business Desktop app should start on its own and then sync your libraries.

This is a known issue. This issue occurs because OneDrive for Business doesn’t restart after you install Office 2016.