How Do You Choose the Right Service for Powershell Bulk Uploads to 365 Groups?

First off, a 365 group is essentially a collection of users in Microsoft Entra, and a bulk upload usually means adding multiple users to that group at once. Just so you know, Connect-AzureAD is outdated now, so definitely use Connect-MgGraph instead. This is your go-to for most tasks including user management. ExchangeOnline is more about mailboxes, so unless you're dealing with email-specific tasks, you won't need that.

When deciding which modules to use, start with Microsoft Graph for about 80% of your scripting needs because it handles user accounts and group management quite well. For specific tasks, like managing Teams or SharePoint, use the appropriate modules. If you really need to switch to ExchangeOnline, check if your script relies on features that Graph can't currently support.

For assistance with specific cmdlets, try running `Get-Help -Detailed`. It's a great way to learn about what each cmdlet can do. Also, remember that if a cmdlet doesn't have 'Mg' in its name, such as 'Get-MgUser', then it's not from Microsoft Graph and might not be your best bet for newer services. Stick to Microsoft Graph for most things unless you find it's not meeting your needs.