Add EnableRevokeGuiSupport advanced setting to Set-LabelPolicy.md

Adding information on the EnableRevokeGuiSupport advanced setting that allows admins to hide the track & revoke button from the sensitivity menu in Office apps.

Author: cabirch

exchange/exchange-ps/exchange/Set-LabelPolicy.md

@@ -374,6 +374,8 @@ Supported settings for built-in labeling:
 
 - **EnableAudit**: Prevent Office apps from sending sensitivity label data to Microsoft 365 auditing solutions. Supported apps: Word, Excel, and PowerPoint on Windows (version 2201+), macOS (version 16.57+), iOS (version 2.57+), and Android (version 16.0.14827+); Outlook on Windows (version 2201+), Outlook on the web, and rolling out to macOS, iOS, and Android. Example: `Set-LabelPolicy -Identity Global -AdvancedSettings @{EnableAudit="False"}`.
 
+- **EnableRevokeGuiSupport**: Remove the Track & Revoke button from the sensitivity menu in Office clients. Supported apps: Word, Excel, and PowerPoint on Windows (version 2406+). Example: `Set-LabelPolicy -Identity Global -AdvancedSettings @{EnableRevokeGuiSupport="False"}`. For more information about this configuration choice, see [Track and revoke document access](https://learn.microsoft.com/purview/track-and-revoke-admin).
+
 - **DisableMandatoryInOutlook**: Outlook apps that support this setting exempt Outlook messages from mandatory labeling. Example: `Set-LabelPolicy -Identity Global -AdvancedSettings @{DisableMandatoryInOutlook="True"}`. For more information about this configuration choice, see [Outlook-specific options for default label and mandatory labeling](https://learn.microsoft.com/purview/sensitivity-labels-office-apps#outlook-specific-options-for-default-label-and-mandatory-labeling).
 
 - **OutlookDefaultLabel**: Outlook apps that support this setting apply a default label, or no label. Example: `Set-LabelPolicy -Identity Global -AdvancedSettings @{OutlookDefaultLabel="None"}`. For more information about this configuration choice, see [Outlook-specific options for default label and mandatory labeling](https://learn.microsoft.com/purview/sensitivity-labels-office-apps#outlook-specific-options-for-default-label-and-mandatory-labeling).