Logs of SkippedItem Failure during Migration From GWS Gmail to M365 Exchange Online

Brass Contributor

Hello,

 

I have recently completed migration from GWS Gmail to M365 Exchange Online utilizing Migration Batch microsoft provided.

 

Some of items, However, were skipped during the migration.

 

With Powershell Command as below, I found 6 failure errors in common.

 

$ustats=Get-MigrationUserStatistics "UPN" -IncludeSkippedItems -IncludeReport -DiagnosticInfo "Verbose"

$ustats.Report.BadItems | FT folder,subject,failure

 

Could anyone of you let me know of the reasons behind below SkippedItem Failure Logs?

There is no such docs to give me answers for that.

 

1.ConversionFailedException: The message content has become corrupted. --> Decoding of header Subject failed; raw value: --> Character set name (5601) is invalid or not installed.

 

2. GoogleEventRecurrenceException: Error occurred while converting iCal recurrence to XSO recurrence. RRULE: 'Start.Date="" . Error : 'Invalid ICAL element: RRULE.InvalidRecurrenceUntil'

 

3. GoogleEventIgnoredTombstoneInstanceOrphanException: Ignored a tombstone of an instance of a series in which the user does not have access to the entire series.

 

4. MessageSubmissionExceededException: Cannot save changes made to an item to store. --> MapiExceptionMaxSubmissionExceeded: Unable to save changes.

 

5. UnsupportedGmailFilterComponentException: Unsupported Gmail filter criteria or action.

 

6. UnsupportedGmailFilterExpressionException: Unsupported Gmail filter expression.

 

Thank you in advance!

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