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emsmdb on non-domain-joined laptop

原文 2018-10-12 15:14:25 4 0 mapi/ outlook-2013/ exchange-server-2016

We have a BYOD laptop with Office 2013 on Windows 10, fully patched, not domain joined, connecting to Exchange 2016 on-premises. We noticed that when Outlook is running on this particular laptop, there are thousands of password failures going to a MAPI URL with the local logon account credential (computername\\user) – this is from inspecting the NTLM handshake.

POST /mapi/emsmdb/ MailboxId=@ &CorrelationID=;&cafeReqId=; 443 - IP Microsoft+Office/15.0+(Windows+NT+10.0;+Microsoft+Outlook+15.0.5059;+Pro) – host 401 1 2148074254 31

Has anyone seen this behavior before?

0 answers

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