sorry for repost,
exchange 2010 onpremise migrating to office 365.will get rid of exchange 2010 in the end.
We havent decided whether we want SSO or not and to implement adfs just yet, can ADFS still be implemented after we complete the migration and decomission the exchange etc.
if we do go ahead with SSO, are there any steps to convert onpremise user to MEU for Exchange 2010 => step 2 Convert on-premises mailboxes to mail-enabled users on: http://community.office365.com/en-us/wikis/exchange/835.aspx this only has 2003 and 2007.
Should I be performing an staged migration instead, I have about 100 mailboxes.