Microsoft Teams App Bar Calendar Issue

Howdy Folks!!

Hope everyone is busy working from home and sticked to their laptops/desktops or whatever devices you may be using but one tab must be open for Tech Community as I will be throwing lots of questions coming up from the customers end: So here is the query where Customer is unable to see the Calendar Icon in their Teams Application using for the first time! As suggested I have already applied the app policies from Teams Admin to give permission to pin the left pane with Calendar icon from Global App policy within Teams Admin. But yet the Calendar Icon is not visible in Teams Desktop App!! 

App permission policies for Calendar Icon

Any specific reason or time frame when it will start appearing in Teams Desktop Application?? Due to the absence of this Calendar icon Customer who is having Office Business License unable to set meeting from Teams App as the Office Business doesn't include Outlook or Exchange Online Licenses!!