(hr=0x80004005, ec=1142) when trying to migrate Exchange Server user

Question

Hi, I want to do On-premise Exchange 2016 to 2019 Migration and Co-existence. I got this error when trying to migrate user from 2016 to 2019 server.

Answer 1

To anyone who might face this problem HR 0x80004005 EC 1142 in the future, the solution was to enable MAPI over HTTP: Set-OrganizationConfig -MapiHttpEnabled $true.

Answer 2

Hi @Ardan Zaki ,

Please check the firewalls on both sides to ensure the network connection between the servers.

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Answer 3

Hi @Ardan Zaki ,

Please check first whether the status of the target database is mounted and then try the following.

1.Try to migrate via New-MoveRequest command:

New-MoveRequest -Identity '<mailbox>' -TargetDatabase "<database name>"

2.Try to move the user to a new database on another server to determine if the migration problem is caused by the mailbox.

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Answer 4

Hi everyone, we finally found the root cause of this problem. Turns out the Antivirus was blocking the transaction and it resolved after we disabled the antivirus and reconfigured it.