Service Accounts

In order for the Email Signature Manager Service to be able to write Outlook signatures and deploy OWA signatures to user mailboxes using Exchange Web Services (EWS), it is necessary to create an appropriate service account on Exchange Server. The details of this account (or accounts if you have a hybrid environment) are then entered in the Environment Configuration dialog.

•If you are using On-Premises Exchange Server, create an account using Active Directory User and Computers on a domain controller and then assign it to the Application Impersonation role depending on the version of Exchange Server you are using:
 
è On Exchange Server 2016 and 2019.
è On Exchange Server 2013.

 
In addition, please read this topic on Exchange Server Throttling Policies.

•If you are using Hosted Exchange, you will need to contact your hosting provider and ask them to create an account with the appropriate permissions.
 

•If you are using Office 365, a service account is not required; instead, Email Signature Manager authenticates with Office 365 as an application with a certificate. Please read this topic for more details.

Note If you have selected the Exchange without mailbox access option in the Environment Configuration dialog, then you do not need to create any service accounts. However, selecting this option, OWA signatures will not be deployed, and automatic support for Outlook signatures for remote users will not work.