Good day,
I have an Exchange 2013 environment with 2 x Cas and 2 x MBX servers.
This environment have been working well since 11/2013 and suddenly on 2nd May 2014 all my outlook clients prompted me for username and password.
What i have tried:
I have tried to delete the profiles on selected users with different Windows and Outlook versions.
I have checked to see if i can ping servers from clients.
I entered usernames and password numerous times when prompted.
All firewalls confirmed to be off.
Tested if i can access OWA internally. It is working perfectly fine.
I have no idea what has caused this.
Guys i need your assistance urgently and thank you in advance for looking into my problem.
