regarding outlook .OST file redirection to network share

Hi Friends,

I would like to know how can we redirect my .OST file to network share link (for example N:\share\userprofile\%username%\....) because I don't want to use writable volumes.

so far I created on ADMX file for outlook cache which looks like below

under OST location option inside, I used my network share (eg: N:\share\userprofile\%username%\....) but I can't able to write my .ost file at specified location (network share).

and also when every I open the outlook I am seeing the one small MS office configuring pop up screen for 20 seconds!

please try to help me

Thanks