Versions

V1.1 - 2016 March

link - docs.microsoft.com/en-us/office/dev/add-ins/reference/manifest/versionoverrides?view=office-js
link - stackoverflow.com/questions/52006389/outlook-add-in-versionoverides-is-not-a-valid-child-element-of-officeapp
Hosts - FormFactor - MobileFormFactor added. This enables add-in commands in Outlook mobile
Pinnable Task Panes

<VersionOverrides xmlns="http://schemas.microsoft.com/office/mailappversionoverrides" 
                  xsi:type="VersionOverridesV1_0"> 

   <VersionOverrides xmlns="http://schemas.microsoft.com/office/mailappversionoverrides/1.1" 
                     xsi:type="VersionOverridesV1_1"> 
   </VersionOverrides> 

</VersionOverrides> 

V1.0 - 2015 September

Add-in Commands for Outlook 2016

<VersionOverrides xmlns="http://schemas.microsoft.com/office/mailappversionoverrides" 
                  xsi:type="VersionOverridesV1_0"> 

<VersionOverrides xmlns="http://schemas.microsoft.com/office/taskpaneappversionoverrides" 
                  xsi:type="VersionOverridesV1_0">