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<\/div><\/div>\nIn my practical example, the two sites are on different tiers, and have no connection to each other.<\/div><\/div><\/div>\n
However, if the Fabrikam users have to work with the new mailbox and the new primary SMTP from now on, they will connect to the new mailbox.
\nIn this scenario, the mail content migration can run independently of this.<\/p>\n
\u00a0<\/p>\n
In this article, I will show you a way of carrying out the mail content migration as a \u201csilent big bang\u201d.<\/p>\n
The longer the users work with the new mailbox, the less important the old mail address becomes (for the mail flow).
\nIt is therefore advisable to set up forwarding to the new mail address (new tenant) for the old mail address (old tenant).
\nFor individual users, this can be easily implemented via the Exchange online Admin Centre.
\nFor multiple users, the PowerShell is a useful tool.
\nThe prerequisite for this is that the corresponding Exchange online PowerShell module has been installed.<\/p>\n
One variant is to use the following script:<\/p>\n
# List of Users and their forwarding addresses<\/em>\r\n\r\n$users = @{\r\n \u00a0 \"AlexW@fabrikam.com\" = \"AlexW@contoso.com\"\r\n \u00a0 \"DebraB@fabrikam.com\" = \"DebraB@contoso.com\"\r\n}\r\n\r\n# Setup forwarding<\/em>\r\n\r\nforeach ($user in $users.GetEnumerator()) {\r\n \u00a0 Set-Mailbox -Identity $user.Name -ForwardingSmtpAddress $user.Value -DeliverToMailboxAndForward $True\r\n \u00a0 Write-Host \"Forwarding for $user.name is set!\" -ForegroundColor Green\r\n}<\/pre>\n\u00a0<\/p>\n
This works for a large number of users.
\nHowever, if you prefer to work with a CSV file, the script in the following link might help you.<\/p>\n
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