Initial situation
Following the takeover of the Swiss sites by another group, our client had the task of migrating all of its data and user accounts from a tenant Microsoft 365 based in France to an independent Microsoft tenant hosted in Switzerland.
The volume represented the migration of approximately 500 mailboxes (BAL) and OneDrive for a total of more than 5 TB as well as the recovery of more than 700 accounts.
Goal
Our client wanted to benefit from the services of consultants with a strong experience cloud and infrastructure in order to realize the migration of the following services cloud in a separate entity:
The migration had to be completed in a short period of time, without loss of data and with minimal impact on users' work.
Concept
During this project we supported our client in the implementation of a new local Active Directory , a new Microsoft tenant and the implementation of user synchronisation with AD Connect.
A detailed analysis of the outbuildings on the former tenant and the various elements to be taken over was carried out.
Once the prerequisites were in place, we proceeded to set up the different configurations and accounts on Azure AD and Microsoft 365 and launched the migration data on the new tenant using a third party tool.
On the day of the migration users on the new tenant, we finalised the migration data and modified the various records so that they point to the new location.
This last phase was carried out at the weekend in order to limit the impact on end users.
The next day, users were able to log on to the new tenant and retrieve all their data.
Result
This migration has enabled the client to have its own environment and no longer depend on the old infrastructure of the group it left.
During the takeover we encountered several constraints and challenges, due in particular to the complex environment of our client and the many projects he had to carry out in parallel, but despite these migration was completed on time and to the full satisfaction of our client.
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