This short document outlines some steps which can be performed on an Exchange 2013 in order to improve the overall security (also called as hardening).
Abstract: If you send a Skype for Business (=SfB) user a chat messages you might receive the following error: This message wan´t send to <Firstname LastName>
Abstract:This short HowTo drives true the steps to install a Microsoft Office Online Server which can be used for Microsoft Skype for business (or Exchange 2016, but we will cover only SfB here).
Abstract: You migrated from Exchange 2010/2013 to 2016, but AutoDiscovery is not working correctly for migrated users.
Abstract: After installing an Skype for Business Server update you might need to update the background Database here as well. Here is a short HowTo which explains the steps and also a way to check the versions.