SharePoint 2013 install error 1603

if you get an error such as

Problem Event Name:                        OfficeClassicSetup

  SETUP EXE VERSION:                        15.0.4454.1000

  SETUP DLL NAME:                            SVRSETUP.DLL

  SETUP DLL VERSION:                        15.0.4709.1000

  ERROR CODE:                                   1603

  MSI HRESULT:                                   Unspecified

  ERROR DETAILS:                               FC73469E

  FIRST ERROR CODE:                         1603

  OS Version:                                       6.3.9600.2.0.0.272.7

  Locale ID:                                          1033

it may mean that you need to ad resources: check if you have 4vCPU, disk space 80GB+

Re.run setup

takeover tenant in office 365

https://powerbi.microsoft.com/en-us/blog/how-to-perform-an-it-admin-takeover-with-o365/

OWA or ECP ADFS error "wrongaudienceuriorbadsigningcert"

https://vandijk.cloud/ad-fs-for-ecp-or-owa-fails-with-error-wrongaudienceuriorbadsigningcert/

Offline IM for Skype and Lync

Offline IM -  a feature that allows you to get missed IM while you are offline is not avaiable for Lync 2013 server, but is for Skype for Business server: https://docs.microsoft.com/en-us/skypeforbusiness/deploy/im-and-presence/enable-or-disable-offline-im

PGP for Widows

https://www.gpg4win.de/thanks-for-download.html

Verify certificate with command line certutil.exe

The command to verify a certificate:

certutil -f -urlfetch -verify C:\temp\www.google.de.crt

https://www.admin-enclave.com/en/articles/windows/57-how-to-verify-the-certificate-chain-via-windows.html

CentOS 7 on Hyper-V 2016

CentOS 7 minimal installs happily on Windows Server Hyper-V 2016. Do not forget to run
nmcli
nmtui

to active network connection, as by default it is not active.