This article explains how to find your Office 365 tenant name which is required when creating a connector for Office 365 migrations and coexistence.
Solution 1:
OneDrive for Business Service
Login to Office 365.
In the App Launcher, click on the OneDrive App to open in your browser.
The url will look like https://tenantname-my.sharepoint.com/personal/<your user name>/_layouts/15/onedrive.aspx
Your tenant name in the left part of -my
Solution 2:
Sharepoint Services.
In the App Launcher, click on the SharePoint app.
This opens a URL like https://tenantname.sharepoint.com/_layouts/15/sharepoint.aspx
Tenant name in the left part .sharepoint.com
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