1. Check the Domino cluster replication if any.
2. Make sure that you are making the ACLs changes on the Domino Server
that is targeted by MNE.
3. If you make ACLs changes in Domino-A, and MNE is connecting to Domino-B
but Domino-A's changes did not sync to Domino-B, then MNE might migrate the old ACLs to exchange.
4. MNE does not need to wait after making ACLs changes.
But we expect the cluster to keep syncing.
5. Make sure that that the domino accessed by MNE and the one configured
are the same one.
6. You can also decide not to change the ACLs just before you start the migration
so you will have no ACLs changes when you start the migration.