Microsoft has delayed the release of the June 2021 cumulative updates for Exchange Server for two weeks to integrate the Windows Antimalware Scan interface.
The Outlook Places service uses metadata stored for conference rooms and room lists to help users find suitable meeting places.
It's important to know if a tenant has any very large distribution lists as these might be the source of reply-all mail storms. An old article explains how to report the membership counts for distribution lists.
A variety of methods exist to block access to Microsoft 365 accounts (Azure AD) from a complete block to a conditional access policy.
Many Exchange Online scripts use the old Get-Mailbox cmdlet to fetch mailbox data. It's time to change these calls out and replace them with Get-ExoMailbox. The new cmdlet is faster than the old and more resilient in its ability to handle server glitches. There's no reason to continue using the old Remote PowerShell cmdlets unless you like slowness and errors.
Updates to Outlook clients (desktop, mobile, and OWA) respect the advanced settings in label policy which previously needed the deployment of the unified labeling client.
The New-DistrubtionGroup cmdlet has been in Exchange since 2006. It creates a new distribution list that is easily populated with a few commands.