the following configuration for SME 7.1 is no longer supported:
Windows Server 2008 R2
Exchange 2010 SP3 RU1 – RU5
WMF/PowerShell 3.0
SME 7.1
The supported configuration will now be:
Windows Server 2008 R2
Exchange 2010 SP3 RU5
WMF/PowerShell 4.0
SME 7.1
this is because Microsoft does not support WMF 3.0 on Server 2008 R2 running Exchange 2010 SP3, with any RU version.
SME 7.1 requires a minimum of PowerShell 3.0 (part of WMF 3.0) in order to run.
Feel free to review the Exchange Server Supportability Matrix located here: https://technet.microsoft.com/en-us/library/ff728623%28v=exchg.150%29.aspx.
All existing documentation (ISG, Admin Guide, IMT) will be updated shortly to reflect this change in requirements.
hope that helps,
Domenico.