How to Determine the Age of a Microsoft 365 Tenant

Finding the age of a Microsoft 365 tenant isn’t an important administrative operation. However, understanding how to retrieve this information (if asked) is an interesting question, which is why we spent several hours playing around with PowerShell and the Microsoft Graph to figure out how to answer the question. It’s the kind of in-depth analysis we do all the time to build content for the Office 365 for IT Pros eBook.

Why Typed Variables Matter When Using Microsoft 365 PowerShell Cmdlets

PowerShell pros know the secrets of typed variables and why this matters when cmdlets return data, but some of us have been doing things wrong for years. Which is why I spent a couple of hours contemplating the differences between typed and untyped variables when handling items returned by cmdlets. They say that old dogs can’t learn new tricks. I beg to differ…

How to Report Who Uses SendAs Permission to Send from an Exchange Online Mailbox

Exchange Online mailboxes support SendAs, Send on Behalf Of, and FullAccess permissions. A previous script focused on the FullAccess permission. This version covers all three. It’s also a good example of how you need to pay attention to property sets when writing PowerShell code to use the new Exchange Online REST-based cmdlets.

Reporting Exchange Online Folder Permissions

In addition to mailbox permissions, Exchange Online supports folder-level delegated permissions. Users can create folder delegations through Outlook desktop. Like mailbox permissions, it’s a good idea for tenants to check folder-level delegations to ensure that people don’t keep permissions for longer than they should. We explain how to create a PowerShell script to generate such a report.

How to Create a Report About Exchange Online Mailbox Permissions

Exchange Online makes it easy to assign delegated permissions for user and shared mailboxes. But permissions assigned to people might not be still necessary, so it’s good to do a periodic check. In this post, we describe a script to scan for permissions on Exchange Online user and shared mailboxes and highlight non-standard permissions in a report generated as a CSV file.

How to Use PowerShell to Send a Welcome Message to New Office 365 Users

Multiple PowerShell modules are available to Office 365 administrators to automate common processes. In this case, we want to send a welcome message to new accounts. Three PowerShell modules are available, but what’s the best in terms of performance and ease of use? There’s only one answer and that’s Exchange Online.

How to Report Exchange Online Mailbox Quota Usage Over a Set Threshold

Some Exchange Online mailboxes are quite small (2 GB for frontline users). Tenant administrators might want to monitor mailbox usage to make sure that quotas aren’t unexpectedly exhausted. This post explains how to use a PowerShell script to calculate the percentage of mailbox quota used and highlight the problem if a threshold is passed.