False positive touchdown

Are you by chance trying the Touchdown Venus version? https://play.google.com/store/apps/details?id=com.nitrodesk.venus.nitroid

If so, it could be because that seems to be a pre release version. Any pre release apps can be prone to false detections from AV products.

If not the Venus version, which version have you installed? I see there is an older and a newer version for Android V2 and for the rest.

What device and Android version are you using?

Where did you install Touchdown from?

Touchdown is shown as malware.
This is company email app

Just to confirm, is it being detected as malware, or is it being detected as a warning from the App Advisor feature? What is the exact wording of the message.

A screenshot would help if you can.

Instructions to post screenshots can be found here
https://community.norton.com/forums/how-post-image-forums-0