I have 3 Windows 10 Pro 64-bit version 1607 build 14393.576 PCs connected to the same router. All 3 PCs have the same version of Avast free edition installed, version 12.3.2280 (build 12.3.3154.23).
On 2 of the PCs, which also have Office 365 installed, I am getting warnings in the Windows System log, DNS Client Events warning Event ID 1014, but nothing on the other PC.
I contacted Microsoft about this issue and they referred me to this article:
https://support.microsoft.com/en-us/kb/3154531
So, I disabled Avast on one of my PCs with the warnings and the warnings stopped, therefore I suspect there is an issue here with Avast and Office 365 (actually Microsoft Outlook 2016 with Exchange accounts) that needs looking at.
Please advise? TIA