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Grant application impersonation permissions to the 
BEMS
 service account

Complete this task only if your environment has an on-premises 
Microsoft Exchange Server
. For the 
Connect
 service to save instant messaging chats to the 
Microsoft Exchange Server
 Conversation History, the 
Connect
 service account must have impersonation permissions. Complete this task if you use a different service account for 
Connect
.
Execute the following 
Microsoft Exchange Management Shell
 command to apply Application Impersonation permissions to the 
Connect
 service account. This task enables application impersonation for all users to the 
Connect
 service account. 
  1. On the 
    Microsoft Exchange Server
     open the 
    Microsoft Exchange Management Shell
    .
  2. Type 
    New-ManagementRoleAssignment -Name:<
    ImpersonationAssignmentName
    > -Role:ApplicationImpersonation -User:<
    ConnectServiceAccount
    >
     (for example, 
    New-ManagementRoleAssignment -Name:BlackBerryAppImpersonation -Role:ApplicationImpersonation -User ConnectAdmin
    ).