Wednesday, March 13, 2019

Jan. 2019 Exchange Security Update KB4471389 issue

It seems some admins broke their exchange server after installing KB4471389
Symptoms are all exchange related services dies after the update and admins had to reinstall exchange server in recovery mode.

M$ says that can happen when a admin runs the update in normal mode.

Yes next exchange CU will have that patch as well. So run all exchange updates in admin mode all the time!!

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