Microsoft this week rereleased the Windows 10 October 2018 Update, version 1809, after fixing its data-deletion mess. But the new build still has an old mapped-drives bug that’s causing headaches for admins.

Within days of Microsoft’s first release of Windows 10 1809 at the beginning of October, IT pros noticed that Windows File Explorer indicated that mapped network drives appeared to be broken.

“Testing the new 1809 update, and everything seems to be fine except all mapped drives to Windows 2012 file servers show disconnected (red x) after reboots or logoff/on,.

“Everything is fine if user opens the mapped drive. This causes problems when user opens a file located in map drive A but links to another file in mapped drive B.”

Despite taking over a month to fix and test the data-deleting bug in Windows 10 1809, Microsoft didn’t fix this mapped-drives bug.

It has now acknowledged that decision on its Windows 10 update history support page for the rereleased version 1809.

“Mapped drives may fail to reconnect after starting and logging onto a Windows device,” Microsoft says, noting that symptoms include a red X on mapped network drives in File Explorer. The issue affects Windows 10 1809, Windows Server 2019, and Windows Server, version 1809. Microsoft says it is working on a resolution but warns admins not to expect a fix until “the 2019 timeframe”. Reported in ZDNet

Managed Service Clients are being taken care of automatically, but everyone else will have to closely monitor their Windows Updates.