Redirect Outlook From Direct Server Connection To CAS Array

Microsoft has been always advice customer to configure CAS Array although there is only one server needed, unfortunately not many people is following this best practice.

My customer is going to deploy HA for their environment, which originally consist of 1 CAS/HUB server and 1 Mailbox server. Now they planning to have 1 more CAS/HUB server and mailbox server for HA purpose.

All the client is currently connected directly to the CAS and when  the new CAS is in place, I need to redirect them to connect to CAS Array.

There is around 700 users in the organization and I’m planning to perform the migration in a big bang strategy and minimize user’s downtime, so, I achieve the goal by using below steps:

  

1. Delete the old CAS DNS A record.

2. Create DNS A record for CAS Array.

3. Dismount all databases and re-mount them.

4. Outlook will perform a new autodiscover search and connect to CAS Array.

I hope this could help you to perform the migration with minimal user impact if you have a similar situation like this.

Outlook 2010 Autodiscover Prompt For Password

I received complain from one of my customer saying that user is getting prompt for password when the open the outlook client.

There is a box pop up for username and password,displaying "Connect to Autodiscover.abc.com"

Although he select "remember my password", the box will prompt again when he close and re-open the outlook client.

I type https:\\server\autodiscover\autodiscover.xml and make sure that it is valid, I also make sure the internal and external url of autodiscover is correct by running commandget-autodiscoverinternalurl and get-rutodiscoverexternalurl .


At the end,I found out that it is cause by the proxy settings. After adding the CAS array url into bypass proxy setting, the problem resolved.


I update the GPO and push it to all the client so that they can get rid of it.