If you re-enroll the device under the Android Enterprise management umbrella you can used Managed Google Play to install the Excel onto your devices. 

If you have to stick to Device Administrator (Android Plus) based management then you may have to sideload the APK via Package install, pulled from an APK mirror. 

Hi Amine,

Thank you for posting on SOTI Central.

Were you able to resolve the request in your post? I agree with Matt here and would also recommend Android Enterprise as it is relatively straightforward to approve the apps you need and update them in the future too.

If Matt's comment helped you to solve this I kindly ask that you mark it as 'Solutioned'.

Kind regards,

Hello Matt, Hello SOTI support,

I just installed an APK in the device.

Thank you

Amine