Forum Discussion
Migrating 400 GB of on-premises mailboxes to 365 with very slow internet
Hello, are there any tools to copy the data of on-premises Exchange Server, bring the copy to a computer with a normal connection speed and then do the migration? If not, what are other possibil...
surajbudhani
Microsoft
MicrosoftYou cannot Migrate a 400 GB Mailbox to Office 365
Assuming its a 40 GB mailbox and an extra 0 was a typo. You can use New-MailboxExportRequest in Exchange OnPrem to export the mailbox data into a PST file and then copy paste this pst file on a PC that has a better internet connection.
Connect that PC to Exchange Online using Remote PowerShell and then use New-MailboxImportRequest to import the data in pst file to a Newly created mailbox in Office 365
- 400 GB is the cumulative size of all mailboxes. The biggest one is about 50 GB, if I remember correctly. What is the maximum size of 365 mailbox?
Thank you very much for the hints on command lets.- surajbudhani
rreimche
Glad the information helped you. Size of a user mailbox will depend on the license assignedFeature
Business Basic
Business Standard
Business Premium
E1
E3
E5
F3
User mailboxes
50 GB
50 GB
50 GB
50 GB
100 GB
100 GB
2 GB
