Today at Microsoft Ignite in Orlando we announced several changes that we hope will help Exchange Online Administrators get their admin tasks completed more efficiently and effectively. We’re bringin...
Updated Nov 05, 2019
Version 2.0
Blog Post
I am having problems with the Get-EXOMobileDeviceStatistics
Getting this error when trying to pull data for a user with multiple devices
Get-EXOMobileDeviceStatistics : Error while querying REST service. HttpStatusCode=500 ErrorMessage={"error":{"code":"InternalServerError","message":"The operation couldn't be
performed because 'xxx@zzz.onmicrosoft.com' couldn't be found.","innererror":{"message":"The operation couldn't be performed because 'xxx@zzz.onmicrosoft.com' couldn't
be found.","type":"Microsoft.Exchange.Configuration.Authorization.CmdletAccessDeniedException"}}}
xxx@zzz.onmicrosoft.com is the account I use to create PowerShell session, it does exist 
The same operation works with fine with Get-MobileDeviceStatistics