https://learn.microsoft.com/en-us/powershell/module/exchangepowershell/new-retentionpolicytag?view=exchange-ps&redirectedfrom=MSDN
New-RetentionPolicyTag (ExchangePowerShell) | Microsoft Learn
Retention tags are used to apply message retention settings to folders and items in a mailbox. Retention tags support a display of the tag name and an optional...
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