ISSUE: You can't enable or disable an archive while the mailbox is being moved

Overview

In Exchange hybrid configuration it's possible to enable Online Archive before the user mailbox is migrated from Exchange Onprem to Exchange Online.

When we try to enable archive mailbox following error may occur:

$HYBRID_CreateArchiveMailbox: An error occurred during Exchange OnPrem Powershell | Mailbox 'User@contonso.com' has move status 'None' and remote host name 'tenant.onmicrosoft.com'. You can't enable or disable an archive while the mailbox is being moved. 

Cause

There is still existing mailbox move request for user.

Solution

Mailbox move request need to be deleted before archive mailbox can be enabled.

Error when you try to enable or disable an archive mailbox for an Exchange Online user or move a mailbox to an on-premises environment - Microsoft 365 | Microsoft Learn

NOTE: If remove of move request won't solve the issue you need to clear value for “msExchMailboxMoveRemoteHost” attribute from the user AD object.