potential DirSync issue before office365 Cutover Migration

When I first set up my 365 Trial my global administrator for 365 was administrator@domain.onmicrosoft.com.  For some reason I decided I didn't want the 'onmicrosoft' portion and created another Global Administrator named administrator@domain.com.

Now that I have gone through with the DirSync process, all of my on-premises users have been synced to o365 but since administrator@domain.com and administrator@domain.onmicrosoft.com already existed on 365, an additional user named administrator6655 has been created.  The administrator6655 user is my personal account from the on-premises environment.

What do I need to do in order to get my on premises account to be synced normally just as all the other users have?  I appreciate any help!
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radukAsked:
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serchlopCommented:
I´m not shure, but I think that you have to delete de administrator@domain.com account in Office 365 and the same for the synced user. You only need to do it in Office 365 not in on-premises domain. Then send a full sync.

Maybe next link could help

http://blogs.dirteam.com/blogs/davestork/archive/2014/08/15/fixing-office-365-dirsync-account-matching-issues.aspx

Maybe you can ask for support team in your Office 365 page to resolve this issue.
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radukAuthor Commented:
Your solution makes sense but I'd like to be sure that will work before I start deleting users and resyncing.  I have made a thread in the Office 365 deployment forum in hope that an MVP can provide some help.  Unfortunately nobody has come to my rescue yet =(
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Vasil Michev (MVP)Commented:
You can use the soft-matching process as described here: http://support.microsoft.com/kb/2641663
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radukAuthor Commented:
Vasil, that is very interesting because Microsoft support told me to simply deactivate dirsync, create a new admin account that doesn't user my on premises name, and delete both o365 admin accounts.  Then re-enable dirsync and do another sync.

Your solution doesn't seem to address my particular issue as I dont even have the exchange admin center yet.
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Vasil Michev (MVP)Commented:
If you are fine with deleting the account, sure. The method described in the article is used to 'link' an on-prem user object to the cloud one, and does so by matching the primary smtp address of the user. You dont need EAC for that, just to be able to edit the proxyaddresses attribute.

Anyway, whatever works best for you :)
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radukAuthor Commented:
Thanks Vasil for the clarification.  If you dont mind telling me, how do you find the primary smtp address of the o365 user?  I'm pretty sure the proxyaddress is just user attribute within on-premises AD.  Not sure what the primary smtp address is of o365 user who doesn't have a mailbox yet(or maybe they do have a mailbox and i just dont know it).
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Vasil Michev (MVP)Commented:
Easiest way is to go to the O365 admin center, Users, Active users and select the user in question. The Information pane on the left will show the Primary SMTP address, if such is present.
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radukAuthor Commented:
There is no primary SMTP address present unfortunately.  I feel as though my on premises and o365 have synced successfully.  I have changed my usernames to user@domain.com from user@domain.onmicrosoft.com and am ready to do the cutover migration.  The only problem now is that I cannot seem to access Exchange Admin Center to create the migration endpoint or migration batch.  Am I missing something here?  How do I get to EAC?  I'm currently using Trial of office 365 business and I just noticed that this does not include 'business class email' for some reason.  Did I just screw myself by not selecting the proper trial?!
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Vasil Michev (MVP)Commented:
Not to worry, you can now mix Business and enterprise plans, so if needed you can just add an Enterprise trial directly in that tenant. But first, check under Admin -> Exchange -> Recipients -> Migration. Direct link to the EAC: https://outlook.office365.com/ecp/

You need to be logged in as Global Admin to access it though.

And if you want to provision the E3 trial, go to https://portal.office.com/Commerce/Catalog.aspx
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radukAuthor Commented:
Thanks Vasil I actually just figured out that I could add multiple trials to my current account.  Thats great.  However, the part where you told me to first check under Exchange-Recipients-Migration, I am currently unable to do that because with my current Trial, I do not have access to any of the EXCHANGE menus since the Trial does not include Exchange online.  

I have added the Premium trial to my account, changed the licenses for users, and am waiting for the mailboxes to be setup.  Once that happens I will create the migration endpoint and cutover batch.  What is the best way to test exchange online with 1 or 2 internal outlook clients once the mailboxes have synced?
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radukAuthor Commented:
The easiest/most straight forward method of resolving my issue was contained in my own comment
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