Remove all objects possible (see Phase 3 of this document).Open the Skype for Business server control panel or PowerShell (whichever way you prefer).Set-CsTenantFederationConfiguration –SharedSipAddressSpace $false.$session = New-CsOnlineSession -Credential $credential.$credential = Get-Credential “Step 3 – Disable Shared SIP Address SpaceĮnsure you have the Skype for business powershell module Marks post has a couple of scripts you can run if you wish to speed up the process internally. I find this is generally pretty quick, so I assume that the source DNS server is used for DNS record checks and it doesn’t have to wait for convergence.Īfter an appropriate convergence time, check that all functionality is working before moving on to further steps.Īgain, this depends on the size of your environment and your internal and external DNS configuration. External DNS changes ActionĪfter completing these updated, check via the O365 portal that O365 is reporting the Skype DNS entries as all good. Its also wise to take a backup of your existing values, just in case. This will lead to downtime, so it is wise to perform this outside of business hours.

I am going to paraphrase the article a little, just so it’s all in one place.ĭepending on your environment, you have a fair idea of idea of how long you need to wait externally and internally for convergence. This document really nails the DNS changes required, so good work Mark Vale. If you are unsure, do not start this process. So below is my attempt at rounding this process out.Īll steps below assume you have already migrated all users to Skype for business and that you are aware of the requirements to stay in hybrid depending on your EV setup.

One of the better documents around web was here – but it still stopped a little short, in my opinion. Depending on how you utilise Skype for Business, you may have no requirement to maintain a hybrid environment once all users are within Skype for Business online.ĭocumentation around decommissioning the on premise environment was surprisingly sparse.

Uninstall skype for business 2016