Sometimes a meeting is better than an impersonal email. See how to create a meeting directly from an email in either the Microsoft Outlook desktop client or the Outlook Web application.
No one likes to cut and paste the content of an email into an invitation to a meeting, nor does it have to manually enter the names of the people to attend. Creating a meeting - either a physical meeting or through Microsoft Teams - directly from an email saves us from the tedious work.

Create a meeting in the Outlook client
There are two ways to create a meeting directly from an email on the desktop client of Microsoft Outlook.
The first method is to select the email and click the Home> Meeting button on the ribbon.

Alternatively, open the email by double-clicking it and click Message> Meeting in the email ribbon.

Whichever method you choose, a new request will be opened for a meeting with contents of the email in its main part request and recipients as participants. Everyone in the "To" field of the original email will be "Required" participants and anyone in the "CC" field will be "Optional" participants.
If you want to convert it to Teams meeting, click on the "Teams Meeting" button in the meeting request.

Create a Meeting in the Outlook Web Application
To create a meeting directly from an email in the Outlook web application, do click in the email so that it is open in the preview window or double click on the email to open fully. Click on icon with the three dots at the top right of the email and select Other Reply Actions> Reply All By Meeting.

A new request will be opened for a meeting with contents of the email in the body of the request and theirs recipients as participants. Everyone in the "To" field of the original email will be Required participants and those in the "CC" field will be Optional participants.
If you want to turn it into a Teams meeting, enable the "Teams Meeting" option.

Source of information: howtogeek.com