Windows 10: Suddenly can't access Exchange Server

Hoping someone may have an idea.

My exchange server has been working fine for years and tonight suddenly it will not respond to anything. If i login locally the OWA works fine but remotely nothing.
This to me is pointing at port 443 being blocked for some reason. Exchange and IIS are working fine otherwise I would not be able to login locally on the machine.
I turned off the firewall and it did not help. Tried to turn off defender but almost impossible of server 2016.
Setup is Exchange Server 2016 running on Server 2016 under ESXi on a big HP server.
Port 443 is listening on the exchange server according to netstat.

My next thought is to restore from a backup two weeks ago and see what that does. I will lose some mail but it might start working again.
Only latest things done was a Defender update and a couple of updates from MS two days ago. It was still working after that though.

:)

 

Exchange Support For Windows Server 2016


Exchange Support For Windows Server 2016

Source: https://blogs.technet.microsoft.com/...s-server-2016/

 

Can Cortana be directed to access my contacts on outlook exchange server?

Hello Yeoto,

Cortana can access your contacts which are in the People app. What we can do is to get those contacts from Exchange server exported, then import it to the People web app. To do so, follow the steps below:

• Export your Global Address List from your Outlook Exchange Server.
• Log in to Outlook People using the Microsoft account connected to your device.
  
• Import the .csv file to Outlook People by clicking Manage > Import Contacts.
  

Use Cortana and check if you can now access contacts from Outlook Exchange Server.

Let us know how it goes.

 

I have my corporate exchange server configured and working for calendar and mail, but it will not let me access my corp contacts

I have my corporate exchange server configured and working for calendar and mail, but it will not let me access my corp contacts. It is selected in the settings but does seem to by completing this task.

Any suggestions?