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- Wait till device times out. Can be around 10 days on certain mobiles.
The status "inactive-mobile' mean that you have signed in your Skype for Business account on mobile devices. Once you’re signed in, you remain signed in as long as there is connectivity. If you’re not actively using the app on your mobile device or on your computer, your status shows as Inactive. If you have connectivity but haven’t used the app for 10 days, you’re signed out. So, even you uninstalled the Skype for Business app form your Android Phone(iPhone or iPad), this status "inactive-mobile" will remain in a period of time, please wait for some time. Or you can sign in your Skype for Business account on Skype for Business desktop client to try to cover this status..