Microsoft has launched the preview of Google B2B Federation, which allows Google accounts to be used to access Azure AD apps. Quite how this will work out for apps that use guest user accounts is unknown at this point.
As announced in this post in the Microsoft Tech Community, the ability to add a new Office 365 Group to an existing SharePoint Online (SPO) site is finally available to Office 365. You will be able to connect existing classic SPO sites to new Office 365 Groups by means of two possible mechanisms: PowerShell (first …
This Petri.com article tells you how to set a policy on confidential Office 365 Groups to stop owners being able to add guest users to the group (or team).
Like all mail-enabled objects, Office 365 Groups can have multiple proxy addresses. Microsoft has fixed a bug in the Set-UnifiedGroup cmdlet so that you can remove proxy addresses from groups, but take care before you do.
The Search-Mailbox cmdlet is very powerful when it comes to removing items from Exchange Online mailboxes, but it can’t deal with other Office 365 content.