Run the following command at the Exchange PowerShell

Set-AddressList "All Users" -IncludedRecipients MailboxUsers
Set-AddressList "All Groups" -IncludedRecipients MailGroups
Set-AddressList "All Contacts" -IncludedRecipients MailContacts

Set-AddressList “Public Folders” -RecipientFilter { RecipientType -eq ‘PublicFolder’ }

Set-GlobalAddressList “Default Global Address List” -RecipientFilter {(Alias -ne $null -and (ObjectClass -eq ‘user’ -or ObjectClass -eq ‘contact’ -or ObjectClass -eq ‘msExchSystemMailbox’ -or ObjectClass -eq ‘msExchDynamicDistributionList’ -or ObjectClass -eq ‘group’ -or ObjectClass -eq ‘publicFolder’))}

Make sure the user you try to use has “Include inheritable permissions from this object’s paret” checked on the Active Directory user’s permissions.

Open “Active Directory Users and Computers” then. Go to “View” and make sure “Advanced Features” is checked, if it isn’t – check it.  Find the problematic user and open its “Properties” (right click –> Properties).  Go to the “Security” tab and click on the “Advanced” button.

Verify that the “Include inheritable permissions from this object’s parent” checkbox is checked. If it is, you may try to reset the user’s permissions by clicking on the “Restore defaults” button.

Private IP address ranges

The ranges and the amount of usable IP’s are as follows: –
Addresses: 16,777,216 –
Addresses: 1,048,576 –
Addresses: 65,536