RWN
RWN returns a comment from a specified cell. If the RWN function is in an unprotected cell, you can enter a comment in the cell and write it back to the database.
Syntax
=RWN("data_connection","cube", "slice_element
{,"slice_element"})
You must specify an element from each dimension in the cube.
Example
=RWN( "BestPracticesOLAP", "Analysis",
"[product].[all tires].[car tires all season]",
"[measure].[gross margin]","[region].[all regions]",
"[channel].[all channels]","[valtype].[variance]",
"[pos].[all pos]","[period].[all years]")