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Exchange 2010 Office 365 Hybrid User Sync


following situation:

On premise Active Directory:
Domainname: test.local
Additional UPN Suffix: test-online.de
Username: lastname.forename@test-online.de

Office 365 Abbonement:
Domainname1: testnet.onmicrosoft.com
Domainname2: test-online.de
Existing Office 365-User:  lastname.forename@testnet.onmicrsoft.com (Office 365 E3 license enabled)

We configured AADConnect to do following:
- Sync AD Objects with Password (Hybrid-Option-enabled)

Hybrid Configuration is not configures yet.
After an AADConnect-sync, we have following situation:

Office 365 Users:
lastname.forename@testnet.onmicrosoft.com (Office 365 E3 license enabled)
lastname.forename@test-online.de  (no license enabled)

Is that behaviour OK?

What would that setup mean for the upcoming Exchange Hybrid configuration?
Which Account will get the additional @testnet.mail.onmicrosoft.com Address and when will that happen?
Is the Addess @testnet.onmicrosoft.com  used anywhere in the Hybrid configuration? Or can I leave this Account in Office365 parallel to to synced user?

Many thanks in advance!
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2 Solutions
Simon Butler (Sembee)ConsultantCommented:
You mean you have two lots of users within Office365? That shouldn't happen if you had set things up correctly. You should have a single set of users, using your internal domain name. The onmicrosoft domain would be an alias.

I would be checking that the domain is configured within Office365 and then try and get it down to a single account. Did you create the users in Office365 first? If so, that was a mistake.
Vasil Michev (MVP)Commented:
Agree with Simon, just want to add that the solution will be to delete one set of users as there's no way to "merge" those accounts. As to avoiding this in the future, if you have users already created in the cloud, use the soft-match method to "link" them to on-prem ones, as detailed here: http://support.microsoft.com/kb/2641663
Simon Butler (Sembee)ConsultantCommented:
Question answered.

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