How to verify your SSAS Version? Remember, we can’t run Select @@Version connecting to SSAS. Let’s see couple of ways where we can get this info.
By Connecting to SSAS from SSMS:
Right Click on the Instance and navigate to Reports->General as shown below.
We can see version information as shown below.
Or…2nd Method: Simply navigate to the folder where SSAS binaries are Installed and locate “msmdsrv.exe” and simply hover your mouse!…In my case it’s “C:\Program Files\Microsoft SQL Server\MSAS11.SQL2012\OLAP\bin”. See below
You can use the 2nd method when SSAS Service is stopped.
MSSQLTREK 
It’s very useful. Thanks