Thomas.Poett@TEAMS (MVP Teams and Cross-Tenant M&A/D Migration Expert Lead)

Hi all, this is part 2 of  7 videos we streamed about the cross-tenant migration during Merger and Acquisitions. After watching this series, you are able to manage and setup a cross-tenant migration project. Knowing whats important, where to have more intense focus on and what possible to migrate and what's not. Part 1: General Overview Part 2: Personal Data Migration (Mailbox, OneDrive, ..) Part 3: Collaboration Data Migration (SharePoint, Groups, ..) Part 4: Collaboration Services (Telephony, Teams, ...) Part 5: Legal and Compliance (Migration and what to consider) Part 6: Device Migration (Azure, Intune, SCCM, ...) Part 7: Change & Adoption

How to hide and un-hide users from Global Address List (GAL) in Exchange Online if they are AD Connect synchronized Hiding User from GAL isn't possible if those are synchronized form On-Premises Active Directory. The local AD is the leading system for all important attributes, like SMTP, UPN and hiding from GAL. Especially during a cross-tenant migration, you do not want to see not migrated user in the GAL. Those User aren't actively working until their cut-over day. Since the Exchange Online attribute  msExchHideFromAddressList s is an AD on-premises parameter, we have two possible ways hiding user in BME from GAL.   Modify the AD Connect for your teant with a custom rule, by using a extensionAttribute to set the HidefromGAL. In this rule, for users which have an entry in the extensionAttribute, hiding / un-hiding will be controlled by AD Connect This is the best option for Cross-Tenant Migration, if you run 2 or more AD Connect system We direct modif...