Support-Tip: (INSTALLATION): EXO Configuration Failure during installation

1. Ensure that you have a Temp folder on Drive C
2. Open an Administrative Command Prompt
3. Navigate to the Installation Media
4. Execute the following command-line
   msiexec /i "Service and Portal.msi" /l*v C:TempServicePortalInstalllog.txt
5. Compress and send the ServicePortalInstalllog.txt

1. In the log file, look for the words Return Value 3
2. Review the information just above Return Value 3

Exception thrown by custom action:

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Exception: Failed logon user while attempting to impersonate user: MIMService

at Microsoft.IdentityManagement.ServerCustomActions.Impersonator.Impersonate(String domain, String userName, String password)

at Microsoft.IdentityManagement.ServerCustomActions.CustomActions.Encrypt(String accountDomain, String accountName, String accountPassword, String unencryptedString)

at Microsoft.IdentityManagement.ServerCustomActions.CustomActions.EncryptExchangeOnlineAccountPassword(Session session)

--- End of inner exception stack trace ---

at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)

at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object parameters, CultureInfo culture, Boolean skipVisibilityChecks)

at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object parameters, CultureInfo culture)

at Microsoft.Deployment.WindowsInstaller.CustomActionProxy.InvokeCustomAction(Int32 sessionHandle, String entryPoint, IntPtr remotingDelegatePtr)

CustomAction EncryptExchangeOnlineAccountPassword returned actual error code 1603 (note this may not be 100% accurate if translation happened inside sandbox)

Action ended 21:41:19: EncryptExchangeOnlineAccountPassword. Return value 3.

Action ended 21:41:19: INSTALL. Return value 3.

• • It is important to note, that the documentation recommends that the service accounts be added to this Local Security Policy.
  • It is not recommended at this point to add it back after the installation, as it will affect the Exchange Online related items.

• • This blog provides information on the accounts needed for a MIM installation.