Some versions of Outlook Actionable Messages (OAM) are not visible on Mac and Mobile devicesIssue OAM (Outlook Actionable Messages) are visible on MS Windows desktops with no limitations, but not always on Mac and Mobile Devices, depending on the installed versions. CauseOutlook Actionable Messages (OAM) are part of the Microsoft product line Office 365, providing solutions to enhance productivity through actionable messages via email. OAM are not supported on some devices, the list of supported devices and versions can be found in the official MS support page:Actionable messages in Outlook and Office 365 GroupsResolutionSince the feature is part of Microsoft products, there is no way for ServiceNow to fix issues related to its visibility, for which it is suggested to contact Microsoft support.