Issues with Outlook/Gsuite mail duplicate calendar cleanup Using "Remove-DuplicateItems.ps1"

I am using a powershell script to hopfully cleanup a users email. BUT the setup is very strange to me and foreign. I am hoping someone can make help me figure out a  few things in hopes of getting this matter resolved.

The office is using gsuite sync/Gmail  for their mail backbone but using outlook on their local hardware to interface the mail. One of the users somehow used the guite sync and created multiple profiles and her email now has multiple calendars in her outlook.  I have tried removing them manually but this didnt really fix the issue because she stated  recently there are still some left. I recently downloaded the  "remove-DuplicateItems.ps1 script from MSN and it works but I run into a few items that are a bit beyond my knowledge and or experience and can use some tips and points on how to get this script working. I got most of it figured out but ran into an issue and here it is .....I am curious do I need the autodiscover if the pst and gsm file for outlook and gsuite sync are on lcoal machine? and do I need to point the script to them to scan for duplicate calendar items ?  



PS C:\users\gail.kaplan\downloads\New folder> .\Remove-DuplicateItems.ps1 -Identity gail.kaplan -Type Calendar -Impersonation -DeleteMode MoveToDeletedItems -Mode Full -Verbose
VERBOSE: Loading C:\Program Files\Microsoft\Exchange\Web Services\2.2\\Microsoft.Exchange.WebServic
es.dll
VERBOSE: Loaded EWS Managed API v15.00.0913.015
VERBOSE: Set to trust all certificates
VERBOSE: Processing items of type Calendar, delete mode is MoveToDeletedItems
Processing mailbox gail.kaplan (gail.kaplan@gkaplanlaw.com)
VERBOSE: Using gail.kaplan@gkaplanlaw.com for impersonation
VERBOSE: Looking up EWS URL using Autodiscover for gail.kaplan@gkaplanlaw.com
C:\users\gail.kaplan\downloads\New folder\Remove-DuplicateItems.ps1 : Autodiscover failed, error:
Exception calling "AutodiscoverUrl" with "2" argument(s): "The Autodiscover service couldn't be
located."
At line:1 char:1
+ .\Remove-DuplicateItems.ps1 -Identity gail.kaplan -Type Calendar -Imp ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,Remove-DuplicateI
   tems.ps1