The below will allow you to list the members of a dynamic distribution group Set-ExecutionPolicy RemoteSigned $UserCredential =…
Very useful script to determine mailbox locations in Office 365: https://blogs.perficient.com/microsoft/2016/03/office-365-script-to-determine-exchange-online-mailbox-location/
Network Testing for Office 365 locations
outlook-namnorth.office365.com outlook-nameast.office365.com outlook-namsouth.office365.com outlook-namwest.office365.com outlook-emeaeast.office365.com outlook-emeasouth.office365.com outlook-emeawest.office365.com outlook-emeacenter.office365.com