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Start-RetentionAutoTagLearning

Use the Start-RetentionAutoTagLearning cmdlet to start auto-tagging for a specified mailbox or to cross-validate auto-tagging results for the mailbox. Exchange PowerShell reference

From the Exchange PowerShell reference 8 parameters Its page in the reference

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Parameters

8 in the Exchange PowerShell reference
-IdentityThe Identity parameter identifies the mailbox.
-CrossValidateThe CrossValidate switch specifies whether items in the specified mailbox are being auto-tagged.
-ClearThe Clear switch specifies whether to clear auto-tags from the specified mailbox.
-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.
-DomainControllerThe DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory.
-NumberOfSegmentsThe NumberOfSegments parameter specifies the number of segments.
-TrainThe Train switch specifies whether to start the training algorithm for auto-tagging on the specified mailbox.
-WhatIf, -wiThe WhatIf switch shows what the command does without making any changes.