Generally if the Office 365 E3 user meets the following pre-requisites heshe should be able to see the option of Add Skype meeting in Outlook Web App OWA.

Skype meeting not showing in outlook web app. On the Home tab ribbon in the Skype Meeting section click New Skype Meeting. It is up to your coexistence mode. The user has been assigned with the full E3 license Exchange online Plan2 and Skype for Business online Plan 2.

Outlook Web App not showing option for Skype for Business meeting According to the documentation here creating a new meeting should include an option to turn a meeting into an Online Meeting. Meet Now is in Outlook Web too. On the Manage menu select COM Add-Ins and select Go.

In the navigation pane select Add-Ins. I invite a person add a meeting location and select Skype meeting. According to the information above I will give you following recommendations.

I prefer the interface of the new Outlook for the web but without Skype for Business its unusable for me. As long as the users account is online and doesnt have a vanity URL they will still see the experience even if their organization has some user accounts that are homed on-premises. 2 Click on Mange COM Add-ins next to Slow and Disabled COM Add-ins.

After you upgrade to Teams only mode it will wait several hours to take effect. The Skype meeting option appears. Users can manually add a hyperlink in the meeting invite that includes the sl1 or follow the instructions below.

In the COM Add-Ins dialog box select the Skype Meeting Add-in for Microsoft Office 2016 option and then select OK. Join as a guest or log in to Skype to have the full set of our features at your disposal. Users who have user accounts on-premises whether they have a vanity URL or not or are managed by Microsoft will see the Lync experience in the Outlook web app.