Hi,
Since migrating from a Exchange 2010 SBS to a Exchange 2013 the mail migration went smooth, but users outlooks keep prompting them for credentials when we turn the old Exchange server offline. I have checked and all the NTLM settings look correct.
Most of the client are using Outlook 2016 they can auto discover everything they need correctly, but when the old server is turned off keep being prompted?
I have tried flushing the credential manager but the issue continues. Outlook Anywhere is turned on and both servers pointing to the same DNS address of "remote.business.co.uk".
Does anyone have any idea's what might cause this?
Many Thanks,
Steveo