User was successfully synchronized by the Directory Synchronization Agent and after mail synchronization was complete the user was switched. The target account is now being used with the target mailbox. Due to an administrative relocation process within the source organization, a new AD user account was created in the source domain. The original source mailbox was reconnected to the newly created source account. The QMM DSA detected this change and re associated the target mailbox to the new source AD user object, however; QMM treated this as a new matching and reversed the mail switch and mail forwarding direction.
This is by design. QMM treats any newly created source account as a new account for synchronization if it is within the source scope and migration if it is in a selected OU for the job.
Under these circumstances, the mailbox can simply be switched manually from the QMM Exchange console.
It would be advisable in this situation to exclude such newly created objects from being synchronized. This can be done by simply moving the object in the source outside the directory scope, selecting the object in the exclude tab of the directory synchronization scope | filter, or by creating and implementing an LDAP filter expression to be used with the DSA scope.
The tool will treat new objects as additional objects that need to be migrated.