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Title
MAgE reports zero items in target mailbox but sync appears to be successful -
Description
The Migration Manager Console and MAgE agent may report zero items for certain target mailboxes whilst synchronization otherwise appears to be successful. Checking natively (with Get-MailboxStatistics PowerShell cmdlet) confirms this. -
Cause
There may be a duplicate target mailbox. -
Resolution
The MAgE log may contain a sequence with a warning for the given mailbox as follows:
2016-01-18 04:35:56.1847 Px1760 Tx19 A103 C52 M808 Warning The specified mailbox "/o=ORG_NAME/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=RECIPIENT_NAME" isn't unique.2016-01-18 04:35:56.1847 Px1760 Tx19 A103 C52 M808 Info Target mailbox items count: (null) size: (null)Check for and resolve the conflicting duplicate referred to by LegacyExchangeDN in the warning above, then confirm that subsequent processing by MAgE retrieves the correct target items count.