Azure AD Connect Migration Help

[benward1]

Looking to remove Azure AD Connect away from a hybrid AD and Microsoft 365 environment. Currently users are synced from local AD. We want to create users in AD and 365 separately (I know(!), but part of a long term plan).

 

Currently users made & configured in AD, synced to 365 and license/mailbox applied.

 

What happens to existing (synced) users? Obviously passwords etc will be separate for AD & 365, but any issues come to mind when I disable synchronisation?

 

Specifically we have edited the proxyAddresses attribute in local AD pointing to the 365 username/email address.

[snagrat]

Nothing will change with the ADSync users but if you plan to enable again in the future then you must clear the ImmutableID for the cloud users.

 

Obviously any further changes in AD will not change the cloud user and all management must be done via the 365 portal (or Powershell)