“The account does not have permissions to impersonate the requested user” error occurs when you connect the Microsoft Dynamics E-mail Router to Microsoft Exchange 2010

You can specify Setup Exchange Impersonation for the account that is specified on the incoming profile if you are using a forward mailbox and for individual user accounts if theE-mail access type-Incoming is set to Router on the user record. To do this, follow these steps:

1. Open the Microsoft Dynamics CRM E-mail Router Configuration Manager.
2. Click the Configuration Profiles tab.
3. Open the profile that has Incoming set for the direction, and then note the account that is specified in theAccess Credentials field.
4. Set up Exchange Impersonation for the account that is specified in step 3. To do this, follow the steps in the following article: http://msdn.microsoft.com/en-us/library/bb204095.aspx
5. Open Microsoft Dynamics CRM.
6. Click Settings, and then click Users.
7. Double-click a user record, and then note the value in the E-mail access type-Incoming field.
8. If E-mail access type-Incoming is set to Router, you must use the information in the following article to set up Exchange Impersonation for the account that is listed in theDomain Name field:  http://msdn.microsoft.com/en-us/library/bb204095.aspx
9. Complete steps 7 through 8 for all users who receive this error.