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technically outlook search and windows search are the same service. did you maybe disable search in your image? that can happen with optimizers.

Thanks @Jack Smith for your quick answer. No it's enabled. Search is working until I enable Outlook cache...

when you restart the search service, does it build the outlook index?

Hum, sorry I am not used to this, I restarted the service but I don't find any file in %pogramdata%/Microsoft. Index is working though...

there is a windows indexing control panel widget, it should show outlook in there as well as things like cDrive... etc.

Yes Outlook is there in the "Included Locations" and the "Index location" is "C:\Program Data\Microsoft"!

then indexing should also be running for outlook.

My indexing status says "Oulook has finished... 0 items remaining..."

then search for outlook should be working

Yes it does but now if I turn the GPO for Outlook cache enabled, Outlook search will be disabled...

Oh i thought you had that setting on. look at these things with the setting enabled.

oh, ok, sorry, it's only monday and I'm already tired 😉

i hear yah.

Hum I enabled again cahed mode, and restarted my session. At first I have the error message I didn't see before ??? "File access is denied. You do not have the permission required to access the file C:\myemailaddress(4).ost." Like there are already .ost files created. But why there ? Anything to do with my problem? If I sign-out and delete the ODFC container, I'm able to open Outlook

you might have a GPO that is defaulting the OST location.

OK I'll try this but what is the best location in the context of FSlogix then ?

Oh, well i'm not sure about that. sorry. normally it would just be in its normal location %localappdata%\microsoft\outlook

I leave it in the default location as well.