Changing Account Names & UPNs

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?
HypervizorAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Vasil Michev (MVP)Commented:
The name is just a 'display' attribute, as long as the GUID/SID remain the same, you should be fine. And the GUID/SID will not be affected by any change in the username, displayname, UPN, etc.

Changing the UPN will of course affect how users log in, but other than that, you should not have any problems.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
HypervizorAuthor Commented:
Thanks.

So are you saying that regardless of how you change the account names, the users environment will be completely preserved and the only change from their perspective is they login using a different format?

When I tried logging on with usera@company.com it created a new desktop for a user which had logged on as domain\usera.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Office 365

From novice to tech pro — start learning today.