How you decommission the on-premises environment depends on whether you intend to leave these attributes in place, or first clear them from your on-premises Active Directory. Once this logical separation is complete, msRTCSIP attributes from your on-premises Active Directory still have values and will continue to sync via Azure AD Connect into Azure AD.
After you've completed these steps, you can decommission your on-premises Skype for Business deployment by using one of two methods referenced in Decide how to manage attributes after decommissioning. These steps logically separate your on-premises deployment of Skype for Business Server from Microsoft 365 and ensure your organization is fully Teams Only. Update DNS records to point to Microsoft 365.Ĭhange the coexistence mode for your organization to Teams Only.ĭisable shared sip address space (also known as "split domain") in the Microsoft 365 organization.ĭisable communication between on-premises and Microsoft 365 Disabling hybrid consists of the following four steps: SummaryĪfter you have upgraded all users from Skype for Business on-premises to Teams Only in Microsoft 365, you can decommission the on-premises Skype for Business deployment.īefore you decommission the on-premises Skype for Business deployment and remove any hardware, you must logically separate the on-premises deployment from Microsoft 365 by disabling hybrid.
Steps 2 and 3 should be done in the same maintenance window because any existing hybrid application endpoints will not be discoverable between steps 2 and completion of step 3.
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