Exchange Powershell attempting to gather all mailboxes that have send as permissions granted

I am working on a migration from on premise Exchange 2010/2013 to Office 365 Exchange online. I am trying to collect a report of all mailboxes of user type and shared type that has send as permissions granted; as well as the names of the mail users that have been granted the permission. The code I am using is as follows.

#Get-Mailbox -RecipientTypeDetails SharedMailbox,usermailbox -resultsize unlimited | Get-ADPermission | where {($_.ExtendedRights -like "*Send-As*") -and ($_.IsInherited -eq $false) -and -not (($_.User -like "NT AUTHORITY\SELF") -or ($_.User -like "S-1-5-*") -or ($_.User -like "NT AUTHORITY\SYSTEM") -or ($_.User -like "BUILTIN\Administrators"))} | select User,identity | Export-Csv $outfile

The code seems to work but after a few minutes I get the following:

I have tried running the code from 3 different exchange servers and keep getting a variation of the same error and am at a loss. I have even tried limiting it to just users and just shared mailboxes to no avail. Any suggestions would be appreciated.

That particular error is pretty specific. Size quotas are preventing success.

You can change the size to see if that resolves your issue.

winrm get winrm/config 

Default configuration

Config
    MaxEnvelopeSizekb = 500
    MaxTimeoutms = 60000
    MaxBatchItems = 32000
    MaxProviderRequests = 4294967295
    Client
        NetworkDelayms = 5000
        URLPrefix = wsman
...


winrm get winrm/config @{MaxEnvelopeSizekb="5000"}

Update, the above should have been set not get, a bad transpose.

winrm set winrm/config @{MaxEnvelopeSizekb="5000"}

Or the cmd that the OP (CBeale) noted.

Set-WSManInstance -ResourceURI winrm/config -ValueSet @{MaxEnvelopeSizekb = "5000"}