Issue:

Eventvwr.exe > Applications and Services Logs > Microsoft Office Alerts

The request was aborted: Could not create SSL/TLS secure channel.
P1: 102036
P2: 16.0.10366.20016
P3: 
P4: 0x800A03EC

Resolution:

Excel seems to be including the dotnet framework for web calls. Run these commands in PowerShell as Administrator and reboot thereafter:

# Enforce TLS1.2 on DotNet Framework on next reboot
Set-ItemProperty -Path 'HKLM:\SOFTWARE\Wow6432Node\Microsoft\.NetFramework\v4.0.30319' -Name 'SchUseStrongCrypto' -Value '1' -Type DWord
Set-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\.NetFramework\v4.0.30319' -Name 'SchUseStrongCrypto' -Value '1' -Type DWord

 

 

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