Ah it's (soon to be) patch recall time already: Security Update MS15-027 / KB 3002657 includes a patched NETLOGON.DLL to resolve a vulnerability in Windows that could allow spoofing if an attacker who is logged on to a domain-joined system runs a specially crafted application that could establish a connection with other domain-joined systems as the impersonated user or system.
There have been several symptoms reported by customers that have installed MS15-027 / KB 300265, which include but are not limited to: 1. Outlook clients cannot connect to Exchange serves (dominant symptom to date) 2. Outlook AutoDiscover breaks 3. Exchange mail flow may be impacted 4. RDP logons fail 5. Shared folder access fails 6. NTLM authenticated operations fail with 0xc000006d / STATUS_LOGON_FAILURE - WJR 🙈🙉🙊
