I am using an account that is a global admin of our 365 tennant.

I am using the code from Office to get a list of OneDrives: https://support.office.com/en-us/article/How-to-display-a-list-of-OneDrive-for-Business-site-collections-8e200cb2-c768-49cb-88ec-53493e8ad80a

I am getting an exception, Unable to process, unauthorized…

    Exception calling "GetUserProfileByName" with "1" argument(s): "Server was unable to process request. ---> Attempted to perform an unauthorized  operation." At line:1 char:1 + $  UserProfileService.GetUserProfileByName("will gazall") + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~     + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException     + FullyQualifiedErrorId : SoapException 

The line its failing at is:

$  UserProfileResult = $  UserProfileService.GetUserProfileByIndex(-1) 

Any variation of $ UserProfileService.GetUserProfileBy* produces the same error.

Has anyone encountered this, or have any suggestions?

Thanks!