Export Outlook shared calendar

Hello Messaging Teams,

Often we see Outlook running slow when there are multiple shared mailboxes or shared calendars configured.

We have seen users with more 70 calendars configured as shared calendars, once that was added was never removed.

I am hoping to export list of all the "Shared Calendars" that a user has in his Outlook using powershell, and then I want to review this globally for all users in the organization. Idea is to find what is required and then remove them.

I have already tried -

Get-Mailbox USER | Get-MailboxFolderStatistics | Where-Object {$_.FolderType -eq 'User Created' -and $_.folderpath -like '/calendar/*'} | select identity, name

Get-MailboxCalendarFolder -Identity "User:\calendar\

Get-MailboxFolderStatistics USER -FolderScope Calendar | Select Name,FolderandSubFolderSize,ItemsinFolderandSubfolders

Nothing has worked till now, I am hoping to understand from the experts if this is even a possibility or if so how can I achieve this...

Thanks in advance