Our domain includes a lot of users who have account names with spaces, e.g. 'Fred Bloggs'.
I know this format isn't compatible with Office 365 and that we would need to change them to something like 'Fred.Bloggs', 'FredBloggs' etc. I also understand that we have to create a UPN suffix for the appropriate domain name, e.g. @mycompany.com.
When I change the user account name, will this create a brand new profile on the computer and as such all program configurations will need to be re-configured? I'm also thinking that it would break ActiveSync and roaming profiles would also need to be updated?