Mailing List Message #105892
From: Shaun Gamble <>
Subject: Re: MAPI cache dat file size
Date: Tue, 17 Nov 2015 10:14:58 +1000
To: CommuniGate Pro Discussions <>
Thanks for the confirmation.

On 16/11/2015 6:25 PM, Brian Turnbow wrote:

You can close OL and delete the cache file with no problems.
The connector will recreate it when it starts.
OL should be much faster afterwards as well.


-----Original Message-----
From: CommuniGate Pro Discussions [] On Behalf Of Shaun Gamble
Sent: lunedì 16 novembre 2015 03:45
To: CommuniGate Pro Discussions
Subject: MAPI cache dat file size

So one of my managers (running latest MAPI with Outlook 2013 on 64 bit
Windows 7) had a 6GB dat file in his profile. It corrupted. I restored
the dat file prior to the corruption and it is working fine again.
However, the dilemma is the cache file shouldn't be this big,
theoretically. He had a large number of emails, which he has since
archived off to multiple PST files. His account is reporting only about
100MB in size now.

If this was a PST file, I would run Outlook's compression on it. This
does not seem to be possible. So how do we compress the cache file? I
know I can delete the profile but I really don't want to go through
that. Any ideas? If I simply delete the cache dat file, will it be
recreated once Outlook is started, as opposed to deleting the whole
profile and having to reconfigure the profile again?



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