Add or remote server from the Lync pool

https://tomtalks.blog/2013/04/lync-2013-gotcha-when-addingremoving-fes-in-topology-publishing-topology-will-reset-the-relevant-pool/

https://docs.microsoft.com/en-us/skypeforbusiness/manage/topology/manage-front-end-servers


When you add or remove a server to the pool in your topology and then publish the updated topology, it will cause all of the servers in the pool to restart at the same time. While the servers are restarting the pool is offline, which will interrupt service for your users connected to that pool. To prevent any interruption of service to users, plan to publish the topology with the new server in the pool during non-business hours.

Windows 2019 server activation error

With a correct key, we can not activate Windows 2019 server:

"We can’t activate Windows on this device as we can’t connect to your organization’s activation server. Make sure that you’re connected to your organization’s network and try again."

The workaround is to do with command line - run as administrator:

slmgr.vbs /ipk   key-key-..

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