Cloudiway uses impersonation for accessing user mailboxes.
Cloudiway automatically configures impersonation if the account defined in the connector is the administrator of Exchange.

How to set impersonation permissions in Exchange 2010 or later

Sometimes, the automatic procedure doesn’t work. For example, if the migration account defined in the connector is not administrator of the Exchange infrastructure, the automatic procedure won’t work.

This article explains how to set this right manually.

Launch the Exchange PowerShell Shell and type the following (where yourdelegateduser is the account defined in the connector):
New-ManagementRoleAssignment –Name “Impersonation MAAS ” –Role “ApplicationImpersonation” –User <yourdelegateduser>