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Just one month ago HAFNIUM generated lot of trouble with patching and searching for vulnerability on Microsoft Exchange Servers. Now another critical security patch is available for exchange, so there are lots of exchange servers to hijack.

See some information about april 2021 Updates

Another useful link for updating your system:

What can I do again? (seem to be clear)

schedule a maintenance and install patch

You can also install this update manually (execute cmd as Admin)
Download Links:

How long did it take? Almost 30 minutes is my overall experience. Until today I did not find any problems.

Happy patching!

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