Question 1

How do I connect to Exchange Online with PowerShell?

Accepted Answer

First install the Exchange Online PowerShell module: Install-Module -Name ExchangeOnlineManagement. Then connect using: Connect-ExchangeOnline -UserPrincipalName admin@yourdomain.com. You will be prompted for authentication, which supports MFA.

Question 2

What permissions do I need for Exchange Online PowerShell?

Accepted Answer

Most cmdlets require Exchange Administrator, Global Administrator, or specific management roles. For auditing and reporting, the Global Reader role often suffices. Some operations like mailbox creation require Exchange Administrator or higher.

Question 3

Why use EXO V3 cmdlets instead of the older versions?

Accepted Answer

EXO V3 cmdlets (like Get-EXOMailbox) are optimized for performance and reliability. They use REST API instead of RPS, support modern authentication, handle throttling better, and are the recommended approach for all new scripts.

Question 4

How can I audit forwarding rules across all mailboxes?

Accepted Answer

Use Get-EXOMailbox -ResultSize Unlimited followed by Get-InboxRule with Where-Object to filter for ForwardTo, ForwardAsAttachmentTo, or RedirectTo. This is an important security audit to detect unauthorized email forwarding.

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