Office 365 Huge PST file

I have migrated to office 365, I still have my old PST file I need to import, but it's over 20gb , and when I try to import it , it doesn't show it's doing something.
Besides copy each folder one by one, it there a way to import such a big file or split it?
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alonig1Asked:
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JohnBusiness Consultant (Owner)Commented:
Try to open it locally in your Outlook (you may need a new profile). Once open, archive old stuff and then Compact the mail file. That will logically split it, depending on the archive point. You can also run Archive a second time to further reduce. Each archive is a new file. Be sure to compact the main mail file to reduce its size.

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Clark KentSoftware Engineer cum BloggerCommented:
Hello Alonig1,

Whatever Jhon said in above comment (Archiving Data and Compress) is absolutely right and even accredited by MVP’s thousands of times, but these tactics do not help to deal with such huge PST file pragmatically. To beat the pants off, you may try any third party utility to split PST file. Once you are done with it, you can import the data file anywhere subtly and fast.

Feel free to ask further!!!

Thanks & Regards
Clark Kent
alonig1Author Commented:
So whats the difference between the archiving that will split the file and a 3rd party that will do it?
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alonig1Author Commented:
And also someone told me to update to the latest office/outlook version (2016) that will help...
JohnBusiness Consultant (Owner)Commented:
If you Archive and Compress, it reduces the size of the main file. It (roughly) comes out the same as Split.
JohnBusiness Consultant (Owner)Commented:
I use Office / Outlook 2016 and it can handle large files, but I still Archive and Compress (Compact) regularly to keep my main file tidy and small.
alonig1Author Commented:
Does office 365 have a way to deal with huge mailboxes?
JohnBusiness Consultant (Owner)Commented:
Online Office 365 (Exchange) can deal with these files, but it is not recommended - performance and synchronization time for offline Outlook.
alonig1Author Commented:
I know they have an archiving feature..

have you used it?
JohnBusiness Consultant (Owner)Commented:
I have not use Exchange Archiving but I know it works. I use local Archiving and that definitely works. Archiving is a longer term proposition to be used regularly. I run Archive every 60 days and monthly is not too frequently.
alonig1Author Commented:
Yes, but the whole idea of having a cloud based (hosted) service is that you will have all of your emails on the cloud, accessible from everywhere anytime.
JohnBusiness Consultant (Owner)Commented:
Archiving for Office 365 Exchange (""in the cloud"") works. I just have not used it.
JohnBusiness Consultant (Owner)Commented:
Your original question was different. "I have a file too big to import" .  So split it up with Split PST or with Archive / Compact locally until it is small enough. Then import. Then set up regular archiving.
Clark KentSoftware Engineer cum BloggerCommented:
So whats the difference between the archiving that will split the file and a 3rd party that will do it?

Actually, Split PST Software divides your PST file into four ways:

1.) Split by Year
2.) Split by Size
3.) Split by Date
4.) Split by Folder

Additionally, it also allows to save new PST file into ANSI & UNICODE file format.

Cheers
Clark Kent
Mark GalvinManaging Director / Principal ConsultantCommented:
Hi

You could try the Office 365 Import Service:
https://technet.microsoft.com/en-us/library/ms.o365.cc.ingestionhelp.aspx

Thanks
Mark
Mark GalvinManaging Director / Principal ConsultantCommented:
We have users that have over 100GB of mailbox data. Their mailbox can host up to 50 GB and their Archive holds up to 100GB.

It works great when using Outlook client but you cannot access Archive from mobile devices.

Thanks
Mark
alonig1Author Commented:
cause
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