add in - Office365 outlook add-in commands -

i'm using following manifest add addin command in outlook 2016.

<?xml version="1.0" encoding="utf-8"?>  <officeapp xsi:type="mailapp"                xmlns:bt="http://schemas.microsoft.com/office/officeappbasictypes/1.0"      xmlns:mailappor="http://schemas.microsoft.com/office/mailappversionoverrides/1.0"               xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xmlns="http://schemas.microsoft.com/office/appforoffice/1.1">    <id></id>    <version>1.0.0.0</version>    <providername></providername>    <defaultlocale>en-us</defaultlocale>    <displayname defaultvalue="" />    <description defaultvalue="" />    <supporturl defaultvalue="" />    <hosts>      <host name="mailbox" />    </hosts>    <requirements>      <sets>        <set name="mailbox" minversion="1.1" />      </sets>    </requirements>    <formsettings>      <form xsi:type="itemread">        <desktopsettings>          <sourcelocation defaultvalue="~remoteappurl/appread/home/home.html" />          <requestedheight>250</requestedheight>        </desktopsettings>        <tabletsettings>          <sourcelocation defaultvalue="~remoteappurl/appread/home/home.html" />          <requestedheight>250</requestedheight>        </tabletsettings>        <phonesettings>          <sourcelocation defaultvalue="~remoteappurl/appread/home/home.html" />        </phonesettings>      </form>      <form xsi:type="itemedit">        <desktopsettings>          <sourcelocation defaultvalue="~remoteappurl/appread/home/home.html" />        </desktopsettings>        <tabletsettings>          <sourcelocation defaultvalue="~remoteappurl/appread/home/home.html" />        </tabletsettings>        <phonesettings>          <sourcelocation defaultvalue="~remoteappurl/appread/home/home.html" />        </phonesettings>      </form>    </formsettings>    <permissions>readwritemailbox</permissions>    <rule xsi:type="rulecollection" mode="or">      <rule xsi:type="itemis" itemtype="message" formtype="read" />      <rule xsi:type="itemis" itemtype="message" formtype="readoredit" />      <rule xsi:type="itemis" itemtype="appointment" formtype="read" />      <rule xsi:type="itemis" itemtype="appointment" formtype="readoredit" />    </rule>         <versionoverrides xmlns="http://schemas.microsoft.com/office/mailappversionoverrides" xsi:type="versionoverridesv1_0">      <description resid="residdescription" />      <requirements>        <bt:sets defaultminversion="1.3">          <bt:set name="mailbox" />        </bt:sets>      </requirements>      <hosts>        <host xsi:type="mailhost">          <desktopformfactor>            <functionfile resid="residdesktopfuncurl" />                     <extensionpoint xsi:type="messagecomposecommandsurface">              <officetab id="tabdefault">                <group id="msgreadtabmessage.grp1">                  <label resid="residtemplatemanagement" />                  <tooltip resid="residtemplatemanagementtip" />                  <control xsi:type="button" id="msgreadtabmessage.grp1.btnview">                    <label resid="residviewtemplates" />                    <tooltip resid="residviewtemplatestip" />                    <supertip>                      <title resid="residvewandmanagetemplates" />                      <description resid="residviewmanagetemplatessprtip" />                    </supertip>                    <icon>                      <bt:image size="16" resid="icon1_16x16" />                      <bt:image size="32" resid="icon1_32x32" />                      <bt:image size="80" resid="icon1_80x80" />                    </icon>                    <action xsi:type="showtaskpane">                      <sourcelocation resid="residmanagetemplatesurl" />                    </action>                  </control>                </group>              </officetab>            </extensionpoint>                    </desktopformfactor>        </host>      </hosts>      <resources>      <bt:images>        <bt:image id="icon1_16x16" defaultvalue="https://contoso.com/owa/images/app_icon_small.png" >           </bt:image>        <bt:image id="icon1_32x32" defaultvalue="https://contoso.com/owa/images/app_icon.png" >          </bt:image>        <bt:image id="icon1_80x80" defaultvalue="https://contoso.com/owa/images/app_icon_large.png" >          </bt:image>      </bt:images>      <bt:urls>        <bt:url id="residdesktopfuncurl" defaultvalue="~remoteappurl/appread/home/home.html" >          </bt:url>        <bt:url id="residmanagetemplatesurl" defaultvalue="~remoteappurl/appread/home/home.html">        </bt:url>        <bt:url id="residaddnewtemplateurl" defaultvalue="~remoteappurl/appread/home/home.html">          </bt:url>        </bt:urls>      <bt:shortstrings>        <bt:string id="residtemplatemanagement" defaultvalue="do.com">          </bt:string>        <bt:string id="residviewtemplates" defaultvalue="launch do.com">          </bt:string>        <bt:string id="residvewandmanagetemplates" defaultvalue="view , manage templates">          </bt:string>         </bt:shortstrings>      <bt:longstrings>        <bt:string id="residdescription" defaultvalue="use app automatically scan outgoing mails , insert content according customizable mark-up. app not share data third-party service.">                 </bt:string>        <bt:string id="residtemplatemanagementtip" defaultvalue="operations managing template collection">              </bt:string>        <bt:string id="residviewtemplatestip" defaultvalue="open taskpane display , manage current templates">              </bt:string>        <bt:string id="residviewmanagetemplatessprtip" defaultvalue="open taskpane display templates saved under profile , default templates provided service. pane can add, remove, or change template properties.">              </bt:string>        <bt:string id="residmytemplatestabtip" defaultvalue="insert content saved collection of prepared data, or embed tags mail automatically replaced on send!">              </bt:string>      </bt:longstrings>    </resources>    </versionoverrides>                  </officeapp>

but button not getting added ribbon. if remove "versionoverrides" addin getting shown in outlook 2016.

so, versionoverrides working somehow button not getting shown inside mail during read , in list of addins in compose mode. missing?

use sample grab manifest, can edit liking: github.com/jasonjoh/command-demo