At the same time, you need to check the authentication type used for the IIS site on the Exchange server. If your Outlook is configured to access the Exchange mailbox using Outlook Anywhere (MAPI over HTTP), verify that NTLM authentication is used.
At the same time, you need to check the authentication type used for the IIS site on the Exchange server. If your Outlook is configured to access the Exchange mailbox using Outlook Anywhere (MAPI over HTTP), verify that NTLM authentication is used.