Hi All, hope someone out there can help me. I have an Exchange 2016 Server with 40 PCs connected, mix of Windows 7 and 10 all using Office 2016. We are experiencing some performance issues so I am checking the HP Proliant Server to see if there is anything I can do to speed things up. I've noticed I should disable Hyperthreading so that will be turned off soon but the other thing is after I have run BPA it states that The Exchange Client Access Server isn't in the Active Directory, Make sure your Client Access Server is in the Active Directory , even though It's running on the Domain Controller. Is the AD missing a record. Outlook takes over 3 mins to connect on a 1 year old PC the first time it's run.