When you click Test Connection on an email server profile to connect Dynamics 365 Online to Exchange on-premises, you encounter the following error:
"The account does not have permission to impersonate the requested user"
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When you click Test Connection on an email server profile to connect Dynamics 365 Online to Exchange on-premises, you encounter the following error:
"The account does not have permission to impersonate the requested user"
This error can appear if the user account specified in the Email Server Profile record does not have impersonation permissions for the Exchange mailbox.
Keywords: Server-Side Synchronization, email, impersonation, test connection