Best wat to migrate from nothing to Office 365 without interruption

I am working on a project to migrate 25 employee from nothing to the Office 365 cloud…
Now, we only have outlook with individual PST downloading messages from pop3, no emails are saved on the hosting server, so everything is locally on outlook 2003/2007/2010.
I am planning on migrate the whole office to the cloud using Office 365 Small Business Premium.
What am I planning to do is:
1.      Create the Office 365 admin account
2.      Verify domain
3.      Create user accounts
4.      Update to Office 2013 in all computers
5.      Create a new profile with the 365 account
6.      Import manually all data from latest PST file, using the IMPORT option from outlook
Technically this will work and it won’t take me that long because I only have 25 users, the problem is the following:
Once the mailbox is ready, receiving mail normally, I import the old pst into the new profile, Outlook 2013 automatically will upload every message to the cloud until the last message is uploaded, but, since I start uploading all the messages I can see on the bottom “UPDATIN INBOX”, this means it´s sending all the message to the cloud, but meanwhile outlook will not update and will not show up new messages until all folders has been updated, so it can take one or two days until all folders are updated so Outlook 2013 can show new email…
What can I do so they can see new mail while uploading old meesages?
Another question, If I set in Outlook 2013 to show only one year, all messages imported past that year will be uploaded right?, but they will be hidden?, and if I install another outlook with the same account then it will only download one year right?

Best regards,
LVL 2
marpanetAsked:
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David Johnson, CD, MVPOwnerCommented:
they can use outlook web access (via their browser) while Outlook is preoccupied
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Vasil Michev (MVP)Commented:
You can automate the process using PST Capture, in this way you will not have to babysit the Outlook client on each PC:

http://technet.microsoft.com/en-us/library/hh781036(v=exchg.141).aspx

As for the other questions, oldest messages will be moved to the archive (default is 2 years move to archive). Outlook 2013 will only copy the last 1 year worth of email to the local drive. The rest will still be in the mailbox, but will be accessed in Online mode.
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marpanetAuthor Commented:
Vasilcho,
Thank you, I have been Reading, and PST Capture Works only in a Domain, that´s right?, because this office does not have a Domain nor a server.
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Vasil Michev (MVP)Commented:
The domain part is for the agent, which is used to get the psts from user's PCs. It is not needed in your case, as you have all psts ready to import.

Anyway, you can do it manually, 25 is not that big number, but will probably cost you a weekend :)
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marpanetAuthor Commented:
That´s weird, because once I open the program PST Capture, it will not let me search for local PST..... do you know how can I do it?, if you do, if not, don´t worry

But yes, maybe I will do they manually and work in Web OWA as ve3ofa stated....
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Vasil Michev (MVP)Commented:
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marpanetAuthor Commented:
It look like it´s working!!!!
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marpanetAuthor Commented:
Vasilcho,
I know that I can copy all PST to a computer, then from only one computer upload to everyone´s mailbox

But, can the PST Capture tool can upload more than one pst at the same time?, or just one by mailbox..??
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Vasil Michev (MVP)Commented:
You can run multiple instances of it, but at the end you will still be limited by bandwidth/throttling on MS side. It's best to run it overnight or on weekends, as with any other major load.
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marpanetAuthor Commented:
I think you can only upload to the same mailbox once at the same time, but now I know it will work with the 25 users!!!

Worked like a CHARM!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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marpanetAuthor Commented:
Thank you for your help!!
OWA is also a solution but not the one I has hopping for!
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