Re: Migrating from hosted Exchange 2010 to Office 365 E3

Hi Savvyxeus,

If you skip step 3, the users will always get a logon prompt when they start the Outlook client no matter whether the users use the same password as their AD account. You need to deploy Single-Sign On for Office 365. It is not recommended that you install AD FS on a Windows 2008 R2 DC.

Thanks,
Edward Qu