Microsoft Plans to Disable SMTP Authenticated Submissions in Exchange Online

by Tony Redmond

Microsoft is doing its level best to remove SMTP basic authentication from Exchange Online as quickly as possible. Basic auth for SMTP connections will disappear gradually as time goes by. Tenants can make accounts more secure by removing SMTP authentication from accounts, something that Microsoft will do in the future when these connections are not used. An exception exists (for now) for SMTP client submissions, but these might also be affected in the future.

Speedy PowerShell Access to Office 365 Groups with Get-ExoRecipient

with 3 Comments by Tony Redmond

The new Exchange Online Management PowerShell module has cmdlets that are faster than their older Remote PowerShell equivalents. Converting scripts to make the new cmdlets work takes some effort because the REST-based cmdlets have their own little quirks that need to be understood and mastered before scripts work properly. This example explains some of the issues met when converting code to report the Inbox sizes and items for Office 365 groups.

Identifying Obsolete Guest User Accounts in an Office 365 Tenant

with 1 Comment by Tony Redmond

Many Office 365 applications now create Azure Active Directory guest accounts. What's the best way to discover if the accounts are active and in use? This PowerShell script uses the Office 365 audit log and message trace data to figure out what guest accounts are active and outputs a CSV file for your review and analysis. Like any other PowerShell script, it can be adapted to suit your purposes.