Its similar to the problem mentioned here:
The users are accessing their Outlook 2007 on a "Terminal Server" Windows Server 2003 R2 Standard SP2.
When the user go "New email" and clicks on "Add attachment" for some files it takes a long time (minutes!) before the file is actually loaded in the mail but for other files its fast.
le1.ext <- fast
ile2.ext <- slow
File 2 is sometimes smaller (in size) than file 1.
After Googling I have done this:
Verified that there are no mapped drives that are not connected.
Verified that Office 2007 SP2 and SP3 are installed.
Defragged the drives (not sure how effective this is considering its a Raid) - used "Contig" to manually defrag some of the pst-files since standard windows defrag would not defrag them.
Ran Chkdsk /f on the drive containing the PST files
Removed all add-ons (there was no AV addon to remove)
Tried to run Outlook in safe mode
Verified that all the users have the same problem
Created a new user with a new Outlook pst file - still same problem
Im now trying to identify if there is a pattern on what type of files are slow but expert help if possible would be very nice! :)