@paulchapman the Office 365 plug-in also supports the Outlook 2016 desktop software. If you are using an olde version of Outlook there is no plug-in support so the Scheduler App is the only option.
I thought I had this sorted but am still having trouble.
I'm using Outlook for Mac with a 365 Business Premium Subscription. I have installed your plugin via the 365 admin website and deployed it but it isn't appearing in my desktop app?
If you create a new meeting request in Outlook you should see the GoToMeeting icon in the top right corner of the meeting email. When you click on the icon you will be asked to sign into your GoToMeeting account, once you have done that you will see the option to add a GoToMeeting to you meeting invitation.
Here's the GoToMeeting solution specific to Mac scheduling with visual aids: https://support.logmeininc.com/gotomeeting/help/install-gotomeeting-in-outlook-for-mac-g2m010030
* The GoToMeeting Scheduler icon will appear at the top of your Mac desktop (menu bar) as a simple black outlined flower symbol, when you are actively using the desktop software.
** Requires Mac OS X 10.10 or later & Microsoft Outlook 2011 – 2016+
Even following these steps I can only use the scheduler app?
Could this be because the email address I use with GotoMeeting is different to onmicrosoft.com email address I have registered office 365 with or something like that?
If you look at the screenshots for the Outlook 365 plug-in located on the install page here, they show you how GoToMeeting will appear after you install it. There is no icon on the Outlook toolbar, you have to first create a new meeting in Outlook and then you will see the GoToMeeting icon. Can you please click on the Outlook menu on your toolbar, select About Outlook and post the version number?