We are running UC 8.5.1 with unified messaging to tie into an exchange 2010 server. We have setup a unified messaging service manually specifying the exchange server and ldap credentials. We have found on the ldap server that the event viewer is getting one of these messages every couple of minutes:
Logon attempt by: MICROSOFT_AUTHENTICATION_PACKAGE_V1_0
Logon account: OURLDAPACCOUNTNAME
Source Workstation: OURUNITYSERVERNAME
Error Code: 0xC0000064
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
The LDAP account is configured correctly and unified messaging appears to be working fine - my calender is syncing with exchange and emails with voicemaila attachments are coming through fine. Anyone know what may be going on here?