Added Office (mobile) under supported

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cc: @iainfoulds

Author: MarileeTurscak-MSFT

articles/active-directory/authentication/active-directory-certificate-based-authentication-ios.md

@@ -35,6 +35,7 @@ This feature is available in preview in Office 365 US Government Defense and Fed
 | Azure Information Protection app |![Check mark signifying support for this application][1] |
 | Intune Company Portal |![Check mark signifying support for this application][1] |
 | Microsoft Teams |![Check mark signifying support for this application][1] |
+| Office (mobile) |![Check mark signifying support for this application][1] |
 | OneNote |![Check mark signifying support for this application][1] |
 | OneDrive |![Check mark signifying support for this application][1] |
 | Outlook |![Check mark signifying support for this application][1] |