you can delete it if you want. outlook will recreate it. :-)

It is 'a binary file that caches the registry extension entries.'


"Daniel" wrote in message
ups.com...
Hi,

I tried to find out what extend.dat exactly is and if I can remove it
safely or if I should keep it.

We currently have AutoArchive on and now we want to turn it off and
move back the files which are in the .pst file.

so once I done that I remove the .pst file but what about the
extend.dat file, should I remove it or keep it.

Im not 100% sure what all it does because I can't find much

TIA