It is possible to import previously recovered PST files to Microsoft Exchange Server.
The operations may differ depending on the Exchange Server version:
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For Exchange Server 2016 and 2019, see Microsoft Docs
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For Exchange Server 2007 SP1, 2007 SP2, and 2007 SP3, see Microsoft Docs
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For Exchange Server 2010 SP2 and 2010 SP3, see Microsoft Docs
Note, that for the command:
New-ManagementRoleAssignment Role "Mailbox Import Export" User Administrator
one should use valid domain administrator credentials.
New-ManagementRoleAssignment Role "Mailbox Import Export" User mydomain\Administrator
After the command is completed, close and re-open the Exchange Management Shell.
For New-MailboxImportRequest, UNC path is required (SMB share on the local machine, other machine or NAS at the local network).
New-MailboxImportRequest -FilePath \\esp-ho-ex2010a\pst\john.smith.pst -Mailbox john.smith
General pattern
New-MailboxImportRequest -FilePath \\SHARENAME\Folder\filename.pst -Mailbox mailbox_name_or_alias
If a file is placed in a non-shared folder, that is C:\Users\administrator.mydomain\desktop\, try the following command:
New-MailboxImportRequest -FilePath \\127.0.0.1\C\$\Users\administrator.mydomain\Desktop\john.smith.pst -Mailbox john.smith