SuspendWhenReadyToComplete is an option introduced in exchange 2010/2013 for online mailbox moves.
This parameter is used to suspend the move request before the mailbox is finally moved to the target database.
When you move a Mailbox from one server to another, you can use the Exchange Management Console to issue a New MoveRequest command. Under the hood this is translated to a Management Shell command which in turn is executed.
You can also use the Exchange Management Shell directly to issue the command by entering the following cmdlet:
New-MoveRequest -Mailbox <> -TargetDatabase <>
This will initiate a move request and the mailbox will be moved. When the move is at approximately 95% then the mailbox will be frozen, the last bits will be moved to the new Database, the Active Directory properties are changed and the mailbox is released again. When online, the user gets a popup message that the administrator made significant changes and that Outlook needs to be restarted.
To avoid this, you can use the SuspendWhenReadyToComplete parameter:
New-MoveRequest -Mailbox <> -TargetDatabase <> -SuspendWhenReadyToComplete
Now, when the mailbox reaches approximately 95% the actual move will stop, but the Mailbox Replication Service (which is responsible for moving the actual mailbox) will keep the two mailboxes in sync. When you check the status of the Move Request, you'll see a status of "AutoSuspended".
The Mailbox Replication Service will keep the two mailboxes in sync for 30 days. After 30 days the 'new' mailbox will be automatically deleted.
This parameter, SuspendWhenReadyToComplete, is not used by the MNE product as this product does not perform any mailbox moves. The product has a single target and will create the mailbox on that target before migrating the data to that mailbox. even in a hybrid environment, you will either need to install two instances of the product for each side (i.e. on premise and O365) or do them one after the other.
This configuration value is not natively used by MNE product.
If you are going from Notes to Exchange, there is no need to make use of a move mailbox operation.
