Hi @Nino Bilic . I installed the update via Windows Updates. Looking
through the logs now, I had the following 3 updates to be installed.
KB5001382, KB890830 and KB5001779 . All 3 were installed successfully,
but when I rebooted and logged back in, the troubles began. Looking back
in Exchange logs i...
@Lyle Epstein - great that you were able to solve this problem! Can you
share how you installed the update? Was it installed via Microsoft
Update (MU) or a manual install and if manually, di you just
double-click on the .msp file after download or did you run it from the
elevated CMD prompt?
Sorry for the repeat post, I was on Exchange 15.1.2176.2 (CU19) which
then broke. I downloaded Exchange CU20 and installed. This still did not
resolve. Digging through the event log, I found repeatedly event ID
15021 HttpEvent, An error occurred while using SSL configuration for
endpoint 0.0.0.0:444...
After installing this patch on Windows Server 2012R2 with Exchange 2016
CU20 with March update, OWA, ECP I do get the login prompt, but after
entering admin creds I get HTTP ERROR 503, along with Exchange
Management Shell Powershell being broken, mail flow is now effected. All
services seem to be up...
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