The following articles list Windows PowerShell cmdlets for SharePoint Online by functionality:
- Use Windows PowerShell cmdlets to manage and monitor an organization in SharePoint Online
- Use Windows Powershell cmdlets to manage connections to services in SharePoint Online
- Use Windows Powershell cmdlets to administer site collections in SharePoint Online
- Use Windows Powershell cmdlets to upgrade SharePoint Online
- Use Windows Powershell cmdlets to manage groups in SharePoint Online site collections
- Use Windows PowerShell cmdlets to administer users and groups in SharePoint Online
- Use Windows PowerShell cmdlets to enable OneDrive sync for domains that are on the safe recipients list
https://technet.microsoft.com/en-us/library/fp161397.aspx
My SharePoint Log 