3384519 - Error "User does not have the authorization to call the necessary functions of group RFC_METADATA" in Analysis Office

Error in AO trace when trying to access BW system from Analysis Office:
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"User does not have the authorization to call the necessary functions of group RFC_METADATA in system XYZ"
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The error can be a little different in some older AO versions:

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"User does not have the autorization to call the neccessary functions of group RFC_METADATA in System XYZ"
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The dev_nco_rfc.log trace (see SAP Note 1830850) contain the following entries:
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error when retrieving metadata from XYZ via destination
...
attempting to select an alternate destination
SAP.Middleware.Connector.RfcInvalidParameterException: Element EX_FUNCTIONS of container metadata RFC_METADATA_GET unknown
at SAP.Middleware.Connector.RfcFunction.RfcCallReceive(RfcConnection conn, RFCID rid)
...
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SAP Analysis for Microsoft Office

Element EX_FUNCTIONS of container metadata RFC_METADATA_GET unknown, attempting to select an alternate destination, NCo, .net , KBA , BI-RA-AO-XLA , Excel Addin , Problem