After SSAS 2012 migration we use to get error:
Errors in the ole db provider. could not connect to the redirector. Ensure that the SQLBrowser service is running on the xxxx server.
This was due to incorrect version of Microsoft Analysis Services OLE DB Provider for Microsoft SQL Server (MSOLAP) in the client Excel.
Microsoft Excel uses MSOLAP to connect to Microsoft SQL Server.
However, Excel cannot connect to a SQL Server Analysis Services database if an incorrect version of MSOLAP is used.
For example, Excel 2010 cannot use Analysis Services OLE DB Provider for SQL Server 2008 R2 (MSOLAP.4) to retrieve data from a Microsoft SQL Server 2012 cube.
To retrieve the data, Excel 2010 must use Analysis Services OLE DB Provider for SQL Server 2012 (MSOLAP.5) instead.
Please download from SQL_AS_OLEDB.msi
Reference Latest version of MOLAP